From Clomosy Docs
function Sqrt(const X: Extended): Extended;
It is used to find the square root of a positive value. The number may be an integer or floating point type.
Example
var
I,sqrtI : Integer;
{
I = 16;
sqrtI = Sqrt(I);
ShowMessage('Sqrt ('+IntToStr(I)+') : '+IntToStr(sqrtI));
}
Output:
Sqrt(16) : 4