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iroot

integer part of r-th root of an integer

Syntax 
iroot(N: INT, R: INT): INT

Description
This function computes the R-th root of an integer. If the argument is not a perfect R-th power it returns the integer part of the root.

Example 
/**/  iroot(25, 2);
5
/**/  iroot(99, 3);
4
/**/  iroot(-1, 3);
-1

See Also