|val||The number to get the square root of.|
If you multiply a number with itself, you get the square of that
number, but sometimes you want to do the reverse and get the square
root of a number. So to find what number has been multiplied with
itself to get any given positive value we use this function.
For example: sqrt(9) will return 3 since 3*3=9.
num = sqrt(exp);
The above code will set the variable "num" to hold the square root of the value contained in "exp".