ForNext

141. default value

VBScript

JScript

Perl

sub my_log {
  my $x = shift;
  my $base = shift // 10;

  log($x)/log($base);
}

my_log(42);
my_log(42, exp(1));

PHP

function my_log($x, $base=10) {
  return log($x)/log($base);
}

my_log(42);
my_log(42, M_E);

Python

import math

def my_log(x, base=10):
  return math.log(x)/math.log(base)

my_log(42)
my_log(42, math.e)

Ruby

def my_log(x, base=10)
  Math.log(x)/Math.log(base)
end

my_log(42)
my_log(42, Math::E)

PowerShell

Scala

F#

C

C++

C++Builder

VC++

C#

Java

Objective-C

D

VB

VB.NET

Delphi

Ada

PL/SQL

T-SQL