Develop - Fibonacci Number Checker

ErSKS commented 7 years ago

Develop a method static boolean isFibonacciNumber(int n)

        System.out.println("1 true:" + isFibonacciNumber(1));
        System.out.println("2 true:" + isFibonacciNumber(2));
        System.out.println("3 true:" + isFibonacciNumber(3));
        System.out.println("4 false:" + isFibonacciNumber(4));
        System.out.println("5 true:" + isFibonacciNumber(5));
        System.out.println("11 false:" + isFibonacciNumber(11));
        System.out.println("21 true:" + isFibonacciNumber(21));

milan604 commented 7 years ago

package finonaccichecker;

/*

@author m-lan */ public class FinonacciChecker {

/**
- @param args the command line arguments */ public static void main(String[] args) { System.out.println("Checking Fibonacci Number..."); System.out.println("1 true:" + isFibonacciNumber(1)); System.out.println("2 true:" + isFibonacciNumber(2)); System.out.println("3 true:" + isFibonacciNumber(3)); System.out.println("4 false:" + isFibonacciNumber(4)); System.out.println("5 true:" + isFibonacciNumber(5)); System.out.println("11 false:" + isFibonacciNumber(11)); System.out.println("21 true:" + isFibonacciNumber(21)); }
static boolean isFibonacciNumber(int n) { return isPerfectSquare(5 n n + 4) || isPerfectSquare(5 n n - 4); } static boolean isPerfectSquare(int n) { int Sq = (int) Math.sqrt(n); return (Sq * Sq == n); } }

screenshot from 2017-08-13 14-44-15

jagdish4249 commented 7 years ago

package fibcheck;

import java.util.Scanner;

/*

@author Jagdish Duwal */ public class FibCheck {

/**

@param args the command line arguments */

static boolean isFibonacciNumber(int x ){

int a = 0, b = 1,c,pos=0;

if(x<a) { System.out.println("invalid input");

}else{

while(x>=a){
     c= a+b;
            a=b;
            b=c;
            if(x==a){
                pos++;
                break;
            }

}

} if(pos > 0 ) return true; else return false;

}

public static void main(String[] args) { int x;

 System.out.println("1 true:" + isFibonacciNumber(1));
System.out.println("2 true:" + isFibonacciNumber(2));
System.out.println("3 true:" + isFibonacciNumber(3));
System.out.println("4 false:" + isFibonacciNumber(4));
System.out.println("5 true:" + isFibonacciNumber(5));
System.out.println("11 false:" + isFibonacciNumber(11));
System.out.println("21 true:" + isFibonacciNumber(21));

} } capture

karmi214 commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package fibonaciinumberchecker;

/*

@author Anish */ public class FibonaciiNumberChecker {

static boolean isFibonacciNumber(int n) { int f1 = 0, f2 = 1; boolean f = false; while (n >= f1) { if (n == f1) { f = true; break; } f2 = f1 + f2; f1 = f2 - f1; } return f; }

/**
- @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here System.out.println("1 true:" + isFibonacciNumber(1)); System.out.println("2 true:" + isFibonacciNumber(2)); System.out.println("3 true:" + isFibonacciNumber(3)); System.out.println("4 false:" + isFibonacciNumber(4)); System.out.println("5 true:" + isFibonacciNumber(5)); System.out.println("11 false:" + isFibonacciNumber(11)); System.out.println("21 true:" + isFibonacciNumber(21)); }

}

RakenShahi commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package fibonaccicheck;

/*

@author DELL */ public class FibonacciCheck {

static boolean iPS(int x) { int s = (int) Math.sqrt(x); return (s * s == x); }

static boolean isFibonacciNumber(int n) { return iPS(5 n n + 4) || iPS(5 n n - 4); }

public static void main(String[] args) { System.out.println("1 true:" + isFibonacciNumber(1)); System.out.println("2 true:" + isFibonacciNumber(2)); System.out.println("3 true:" + isFibonacciNumber(3)); System.out.println("4 false:" + isFibonacciNumber(4)); System.out.println("5 true:" + isFibonacciNumber(5)); System.out.println("11 false:" + isFibonacciNumber(11)); System.out.println("21 true:" + isFibonacciNumber(21)); } }

OUTPUT fibonaccicheck

SusanCB commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package task10.pkg2;

/*

@author nissus */ public class Task102 {

/**
- @param args the command line arguments */ public static void main(String[] args) {
  
  System.out.println("1 true:" + isFibonacciNumber(1)); System.out.println("2 true:" + isFibonacciNumber(2)); System.out.println("3 true:" + isFibonacciNumber(3)); System.out.println("4 false:" + isFibonacciNumber(4)); System.out.println("5 true:" + isFibonacciNumber(5)); System.out.println("11 false:" + isFibonacciNumber(11)); System.out.println("21 true:" + isFibonacciNumber(21));
  } static boolean isFibonacciNumber(int n){ int a=0,b=1,c=0,count=0; if(n<a) { System.out.println("invalid input");

} else { while(n>=a){ c= a+b; a=b; b=c; if(n==a){ count++; break; }

} } if (count>0){ return true; } else { return false; }

} }

fib2

ghost commented 7 years ago

package fibono;

/*

@author Samikshya */ public class FinoChecker {

static boolean isFibonacciNumber(int n) { int n1 = 0, n2 = 1; boolean f = false; while (n >= n1) { if (n == n1) { f = true; break; } n2 = n1 + n2; n1 = n2 - n1; } return f; } } public class FiboNo {

/**
- @param args the command line arguments */ public static void main(String[] args) { System.out.println("1 true:" + isFibonacciNumber(1)); System.out.println("2 true:" + isFibonacciNumber(2)); System.out.println("3 true:" + isFibonacciNumber(3)); System.out.println("4 false:" + isFibonacciNumber(4)); System.out.println("5 true:" + isFibonacciNumber(5)); System.out.println("11 false:" + isFibonacciNumber(11)); System.out.println("21 true:" + isFibonacciNumber(21)); }

capture

}

Sudan15423 commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package tasks;

/*

@author Dragon15423 */ public class Tasks {

/**
- @param args the command line arguments */ public static void main(String[] args) {
  
  // TODO code application logic here
  
  System.out.println("1 true:" + isFibonacciNumber(1)); System.out.println("2 true:" + isFibonacciNumber(2)); System.out.println("3 true:" + isFibonacciNumber(3)); System.out.println("4 false:" + isFibonacciNumber(4)); System.out.println("5 true:" + isFibonacciNumber(5)); System.out.println("11 false:" + isFibonacciNumber(11)); System.out.println("21 true:" + isFibonacciNumber(21)); }
static boolean isFibonacciNumber(int n) {
```
int x, y = 1, z = 0;
while (y < n) {
    x = z;
    z = y;
    y += x;
}
return y == n;
```
}

} task

kajalmaharjan commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package fabonacciiseries;

/*

@author kajal */ public class FabonacciiSeries {

static boolean isFibonacciNumber(int n) { int n1 = 0, n2 = 1, n3, f = 0;
```
if (n < n1) {
    System.out.println("invalid input");
} else {
    while (n >= n1) {

        n3 = n1 + n2;

        n1 = n2;
        n2 = n3;
        if (n == n1) {
            f++;
            break;
        }
    }
}
if (f > 0) {
    return true;
} else {
    return false;
}
```
}

/**
- @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here int n;
  
  System.out.println("1 true:" + isFibonacciNumber(1)); System.out.println("2 true:" + isFibonacciNumber(2)); System.out.println("3 true:" + isFibonacciNumber(3)); System.out.println("4 false:" + isFibonacciNumber(4)); System.out.println("5 true:" + isFibonacciNumber(5)); System.out.println("11 false:" + isFibonacciNumber(11)); System.out.println("21 true:" + isFibonacciNumber(21));
}

} 123

rabina12 commented 7 years ago

public static void main(String[] args) { // TODO code application logic here System.out.println("1 true:" + isFibonacciNumber(1)); System.out.println("2 true:" + isFibonacciNumber(2)); System.out.println("3 true:" + isFibonacciNumber(3)); System.out.println("4 false:" + isFibonacciNumber(4)); System.out.println("5 true:" + isFibonacciNumber(5)); System.out.println("11 false:" + isFibonacciNumber(11)); System.out.println("21 true:" + isFibonacciNumber(21)); }

static boolean isFibonacciNumber(int n) {

    int x, y = 1, z = 0;
    while (y < n) {
        x = z;
        z = y;
        y += x;
    }
    return y == n;
}

}

kiir33 commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package fibonaccicheck;

/*

@author Kiran */ public class FibonacciCheck {

/**
- @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here System.out.println("Checking Fibonacci number..."); System.out.println("Fibonacci Check:0 true:"+ fibFunc(0)); System.out.println("Fibonacci Check:1 true:"+ fibFunc(1)); System.out.println("Fibonacci Check:2 true:"+ fibFunc(2)); System.out.println("Fibonacci Check:3 true:"+ fibFunc(3)); System.out.println("Fibonacci Check:12 false:"+ fibFunc(12)); System.out.println("Fibonacci Check:13 false:"+ fibFunc(13)); System.out.println("Fibonacci Check:21 true:"+ fibFunc(21)); System.out.println("Fibonacci Check:22 false:"+ fibFunc(22));
} static boolean fibFunc(int n){ int a=0, b=1, c; while(a<=n) { if(a==n) return true; c=a+b; a=b; b=c; } return false; }
}

Output: capturefibonacci

sarumdr commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package fibocheck;

/*

@author sarumdr */ public class Fibocheck {

/**

@param args the command line arguments */ static boolean isFibonacciNumber(int n) { int a = 0, b = 1, c, pos = 0; if (n < a) { System.out.println("invalid input");

} else { while (n >= a) { c = a + b; a = b; b = c;
```
    if (n == a) {
        pos++;
        break;
    }
}
```
} if (pos > 0) { return true; } else { return false; } }

public static void main(String[] args) { // TODO code application logic here

System.out.println("1 true:" + isFibonacciNumber(1));
System.out.println("2 true:" + isFibonacciNumber(2));
System.out.println("3 true:" + isFibonacciNumber(3));
System.out.println("4 false:" + isFibonacciNumber(4));
System.out.println("5 true:" + isFibonacciNumber(5));
System.out.println("11 false:" + isFibonacciNumber(11));
System.out.println("21 true:" + isFibonacciNumber(21));

}

OUTPUT

rivab commented 7 years ago

package day10fibonaccichecker;

/*

@author DELL */ public class Day10fibonacciChecker {

/**
- @param args the command line arguments */ static boolean isFibonacciNumber(int n) { int n1 = 0, n2 = 1, n3, f = 0; if (n < n1) { System.out.println("Fibonacci of negative number isnot possible"); } else { while (n >= n1) {
```
    n3 = n1 + n2;

    n1 = n2;
    n2 = n3;
    if (n == n1) {
        f++;
        break;
    }
}
```
  } if (f > 0) { return true; } else { return false; } }
public static void main(String[] args) { // TODO code application logic here int n; System.out.println("1 true:" + isFibonacciNumber(1)); System.out.println("2 true:" + isFibonacciNumber(2)); System.out.println("3 true:" + isFibonacciNumber(3)); System.out.println("4 false:" + isFibonacciNumber(4)); System.out.println("5 true:" + isFibonacciNumber(5)); System.out.println("11 false:" + isFibonacciNumber(11)); System.out.println("21 true:" + isFibonacciNumber(21));

}

} day10

ajay987 commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package checker35;

import java.util.Scanner;

/*

@author Dell */ public class Checker35 {

static boolean isfibonnaccinumber(int n) { int f0 = 0, f1 = 1; while (f0 <= n) { if (f0 == n) { return true; } f1 = f1 + f0; f0 = f1 - f0;
```
}
return false;
```
}

/**
- @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here System.out.println("1 true :" + isfibonnaccinumber(1)); System.out.println("2 true :" + isfibonnaccinumber(2)); System.out.println("3 true :" + isfibonnaccinumber(3)); System.out.println("4 false :" + isfibonnaccinumber(4)); System.out.println("5 true :" + isfibonnaccinumber(5)); System.out.println("8 true :" + isfibonnaccinumber(8)); System.out.println("11 false :" + isfibonnaccinumber(11)); System.out.println("21 true :" + isfibonnaccinumber(21)); }

} fibo

sthaanu commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package fibonaciicheck;

/*

@author admin */ public class FibonaciiCheck {

public static boolean isFibonacciNumber(int n) { int fib1 = 0; int fib2 = 1; do { int Fib1 = fib1; fib1 = fib2; fib2 = Fib1 + fib2; } while (fib2 < n);
```
if (fib2 == n) {
    return true;
} else {
    return false;
}
```
}

public static void main(String[] args) { System.out.println("1 true:" + isFibonacciNumber(1)); System.out.println("2 true:" + isFibonacciNumber(2)); System.out.println("3 true:" + isFibonacciNumber(3)); System.out.println("4 false:" + isFibonacciNumber(4)); System.out.println("5 true:" + isFibonacciNumber(5)); System.out.println("11 false:" + isFibonacciNumber(11)); System.out.println("21 true:" + isFibonacciNumber(21));

} }

syslin commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package settergetter;

/*

@author dell */ public class FibinocSeries {

public static void main(String[] args) { System.out.println("1 true:" + isFibonacciNumber(1)); System.out.println("2 true:" + isFibonacciNumber(2)); System.out.println("3 true:" + isFibonacciNumber(3)); System.out.println("4 false:" + isFibonacciNumber(4)); System.out.println("5 true:" + isFibonacciNumber(5)); System.out.println("11 false:" + isFibonacciNumber(11)); System.out.println("21 true:" + isFibonacciNumber(21)); }

static boolean isFibonacciNumber(int n) {
```
int a = 0, b = 1, c, count = 0;
while (n >= a) {
    c = a + b;
    a = b;
    b = c;
    if (n == a) {
        count++;
        break;

    }

}
if (count > 0) {
    return true;
} else {
    return false;
}
```
}

} 111

sajanbasnet75 commented 7 years ago

/*

To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor. */ package javaapplication73;

/*

@author LORDsajan */ public class JavaApplication73 {

static boolean isFibonacaii(int x) { int a = 0, b = 1, c, d = 0; while (x >= a) { if (x < 0) { System.out.println("Invalid input"); break; } else { c = a + b; a = b; b = c; if (x == a) { return true; } } } return false; }

public static void main(String[] args) { System.out.println("1 true:" + isFibonacaii(1)); System.out.println("2 true:" + isFibonacaii(2)); System.out.println("3 true:" + isFibonacaii(3)); System.out.println("4 false:" + isFibonacaii(4)); System.out.println("5 true:" + isFibonacaii(5)); System.out.println("8 true:" + isFibonacaii(8)); System.out.println("11 false:" + isFibonacaii(11)); System.out.println("21 true:" + isFibonacaii(21));

} }

luckydivya commented 7 years ago

package fibonacci;

/*

@author PC */ public class Fibonacci {

/**
- @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here System.out.println("1 true:" + isFibonacciNumber(1)); System.out.println("2 true:" + isFibonacciNumber(2)); System.out.println("3 true:" + isFibonacciNumber(3)); System.out.println("4 false:" + isFibonacciNumber(4)); System.out.println("5 true:" + isFibonacciNumber(5)); System.out.println("11 false:" + isFibonacciNumber(11)); System.out.println("21 true:" + isFibonacciNumber(21)); }
static boolean isFibonacciNumber(int n) {
```
int x, y = 1, z = 0;
while (y < n) {
    x = z;
    z = y;
    y += x;
}
return y == n;
```
}

} }

} fibonacci pattern

rituratnam commented 7 years ago

CODE: package fibonacci;

/*

@author User */ public class Fibonacci {

/**
- @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here System.out.println("1 true:" + isFibonacciNumber(1)); System.out.println("2 true:" + isFibonacciNumber(2)); System.out.println("3 true:" + isFibonacciNumber(3)); System.out.println("4 false:" + isFibonacciNumber(4)); System.out.println("5 true:" + isFibonacciNumber(5)); System.out.println("11 false:" + isFibonacciNumber(11)); System.out.println("21 true:" + isFibonacciNumber(21)); } static boolean isFibonacciNumber(int n) {
int x, y = 1, z = 0; while (y < n) { x = z; z = y; y += x; } return y == n; } } Output

Rajjushrestha commented 7 years ago

public class Fibonacci {

static boolean isFibonacciNumber(int n) {
    int n1 = 0, n2 = 1, n3, f = 0;

    if (n < n1) {
        System.out.println("invalid input");
    } else {
        while (n >= n1) {

            n3 = n1 + n2;

            n1 = n2;
            n2 = n3;
            if (n == n1) {
                f++;
                break;
            }
        }
    }
    if (f > 0) {
        return true;
    } else {
        return false;
    }
}

/**
 * @param args the command line arguments
 */
public static void main(String[] args) {
    int n;

    System.out.println("1 true:" + isFibonacciNumber(1));
    System.out.println("2 true:" + isFibonacciNumber(2));
    System.out.println("3 true:" + isFibonacciNumber(3));
    System.out.println("4 false:" + isFibonacciNumber(4));
    System.out.println("5 true:" + isFibonacciNumber(5));
    System.out.println("11 false:" + isFibonacciNumber(11));
    System.out.println("21 true:" + isFibonacciNumber(21));

}

ErSKS / Java

Develop - Fibonacci Number Checker #35