Lexical Scoping

main.c

#include <stdio.h>

int y = 10;

/* forward declaration of g - required to compile w/o warnings */
int
g(int);

int
f(int x)
{
  int y = 2;
  return y ^ 2 + g(x);
}

int
g(int x)
{
  return x * y;
}

int
main()
{
  printf("f(3) is: %d\n", f(3));  /* will print "f(3) is: 34" */
  return 0;
}

Main.java

public class Main {
  static int y = 10;

  static int f(int x) {
    int y = 2;
    return y ^ 2 + g(x);
  }

  static int g(int x) {
    return x * y;
  }

  public static void main(String args[]) {
    System.out.println("f(3) is: " + f(3));  // will print "f(3) is: 34"
  }
}

main.js

var y = 10;

function f(x) {
  var y = 2;
  return y ^ 2 + g(x);
}

function g(x) {
  return x * y;
}

console.log('f(3) is: ' + f(3));  // will print "f(3) is: 34"

main.py

#!/usr/bin/env python
# encoding: utf-8

y = 10

def f(x):
  y = 2
  return y ^ 2 + g(x)

def g(x):
  return x * y

print 'f(3) is:', f(3)  # will print "f(3) is: 34"

main.R

y <- 10

f <- function(x) {
  y <- 2
  y ^ 2 + g(x)
}

g <- function(x) {
  x * y
}

cat('f(3) is:', f(3))  # will print "f(3) is: 34"