text: 'use strict'
  
  /*
   * Create a constant variables for each primitives
   * `str`, `num`, `bool` and `undef`
   *
   * @notions Primitive and Operators, Variables
   */
  
  // Your code :
  const str = "1337"
  const num =  42 
  const bool = false
  const undef = undefined
  
  
  
  //* Begin of tests
  const assert = require('assert')
  
  assert.strictEqual(typeof str, 'string')
  assert.strictEqual(str, '1337')
  
  assert.strictEqual(typeof num, 'number')
  assert.strictEqual(num, 42)
  
  assert.strictEqual(typeof bool, 'boolean')
  assert.strictEqual(bool, false)
  
  assert.strictEqual(typeof undef, 'undefined')
  assert.strictEqual(undef, undefined)
  // End of tests */
  