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This is the Euclidean algorithm for finding the Greatest common divisor between two numbers. I thought I'd throw a bit of my own code into the fray. The first one uses a loop, the second uses recursion. Could someone benchmark this for me?
#!/usr/bin/perl -w print "GCD: " . GCD( 45, 5 ) . " RecGCD: " . RecGCD( 45, 5 ) . "\n"; #Assumes $A is the largest number sub GCD { $A = shift; $B = shift; $R = 1; while ( $R != 0 ) { $R = $A % $B; if ( $R == 0 ) { return $B; } $A = $B; $B = $R; } } #Assumes $A is the largest number sub RecGCD { $A = shift; $B = shift; $R = 0; $R = $A % $B; if ( $R == 0 ) { return $B; } RecGCD( $B, $R ); }


In reply to Re: Recursion: An example of Looping and Recursion by lolindrath
in thread Recursion by lolindrath

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