Int and Float builtin methods

[am-cid]

for both

1. pow() takes in int/float. always returns self
2. sqrt() rounds down. always returns self. eg b-chan = 10~ pwint(b.sqrt())~ >.< prints 3
3. isNegative()
4. isPositive()

for float

1. ceil() returns float
2. floor() returns float
3. int() returns Int

for int

1. float() returns float