03-170432.py

# coding:utf-8
def λ(a):
  return a

def ほげ(a):
  return a

print λ(5)
print ほげ(5)

03-170649.js

function λ(a) {
  return a;
}

function ほげ(a) {
  return a;
}

console.log(λ(5));
console.log(ほげ(5));

03-170726.el

(defun λ (a)
  a)

(defun ほげ (a)
  a)

(λ 5)
(ほげ 5)