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PERL Functions
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PERL log Function
Syntax
Definition and Usage
Returns the natural logarithm of EXPR, or $_ if omitted.
To get the log of another base, use basic algebra: The base-N log of a number is equal to the natural log of that number divided by the natural log of N.
Return Value
Example
Try out following example:
#!/usr/bin/perl -w
print "log10(2): ", log10(2), "\n";
print "log10(2): ", log10(3), "\n";
print "log10(2): ", log10(5), "\n";
sub log10 {
my $n = shift;
return log($n)/log(10);
}
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It will produce following result:
log10(2): 0.301029995663981
log10(2): 0.477121254719662
log10(2): 0.698970004336019
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