Examples of function scoping in python, C, and JavaScript

scoping_c_inner.c

#include <stdio.h>

int func(int, int, int);

int
main()
{
    printf("%d\n", func(3, 4, 5));
    return 0;
}

int
func(int a, int b, int c)
{
    int d, h;

    d = 7;
    h = 3;

    while (h < 5) {
        int d = 1;

        h++;
        d++;
    }

    return d;
}

scoping_c_outer.c

#include <stdio.h>

int func(int, int, int);

int
main()
{
    printf("%d\n", func(3, 4, 5));
    return 0;
}

int
func(int a, int b, int c)
{
    int d, h;

    d = 7;
    h = 3;

    while (h < 5) {
        d = 1;

        h++;
        d++;
    }

    return d;
}

scoping_js_inner.js

function func(a, b, c) {
  var d, h;

  d = 7;
  h = 3;

  while (h < 5) {
    var d = 1;

    h++;
    d++;
  }

  return d;
}


function main() {
  console.log(func(3, 4, 5));
}

if (require.main === module) {
  main();
}

scoping_js_outer.js

function func(a, b, c) {
  var d, h;

  d = 7;
  h = 3;

  while (h < 5) {
    d = 1;

    h++;
    d++;
  }

  return d;
}


function main() {
  console.log(func(3, 4, 5));
}

if (require.main === module) {
  main();
}

scoping_python.py

def func(a, b, c):
  
  d = 7
  h = 3
  
  while h < 5:
    d = 1
    
    h += 1
    d += 1
    
  return d

if __name__ == '__main__':
  print(func(3, 4, 5))

There are no scoping changes planned for Py3 as far as I can tell. ECMAScript 6, however, is planning on adding a let keyword, which would work normally, unlike that insane var nonsense: all curly braces would create local scope for variables declared with let.