Modern Math ISqrt

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ISqrt

Returns the exact whole-number square root, rounded down.

Syntax

ISqrt( n )

Notes

• exact floor of the true root

Examples

#import "std/numeric"
using numeric

'' The EXACT floor of the true square root -- integer arithmetic
'' throughout, so it cannot be off by one the way clng( sqr( n ) ) can
dim as uint64 n = 26
print ISqrt( n )             '' 5

dim as uint64 sq = 25
print ISqrt( sq )            '' 5

'' At sizes where a double runs out of significand, sqr( ) starts
'' rounding to the wrong integer; this never does

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Library: Math Library
Category: Math Library
Documented under: Nothing Becomes A Keyword