The sqrt function returns the square root function.

Syntax ​

sqrt( X )

Arguments ​

• X: A real number >= 0.

Returns ​

• A positive number such that sqrt(x) * sqrt(x) == x.
• null if the argument is negative or cannot be converted to a real value.

Examples ​

This returns 4:

print sqrt ( 16 )

This returns null:

print sqrt ( -64 )