If we enter the value of a and enter OK button without entering value of b, alert message pops up saying enter values of a and b, but wherein value of a is already entered. Similarly with b, after entering value of b and not entering value of a, same alert message pops up. It can be correctly modified to make the alert message more meaningful.
If we enter the value of a and enter OK button without entering value of b, alert message pops up saying enter values of a and b, but wherein value of a is already entered. Similarly with b, after entering value of b and not entering value of a, same alert message pops up. It can be correctly modified to make the alert message more meaningful.![computer-programming lab Vlabs](https://user-images.githubusercontent.com/42439398/54142702-4fe42380-444e-11e9-97a6-e621460a74d0.png)