Sqr(x)

Sqr returns the square root of the value it has been fed with.
The square value of a number is the value which, if multiplied by itself gives the original number back. Negative numbers don't have a square value. (At least as long as you keep clear of so called imaginery numbers, which Aptilis does not implement directly.)

Return value:
the square root of x.

Example:

r = sqr(2)
print(r)

1.4142135624