Returns the positive square root of the product of pi and a given number.
- number - The number which will be multiplied by pi and have the resultant product's square root returned.
SQRTPI(1) returns the square root of pi.
SQRTPI(9) returns the square root of 9*pi.
- number must be positive;
- To find the negative root of number * pi, multiply the result of the SQRTPI function by -1.