text: 'use strict';
  
  /*
   * Create a constant variables for each primitives
   * `str`, `num`, `bool` and `undef`
   *
   * @notions Primitive and Operators, Variables
   */
  
  // Your code:
  const str = 'string';
  const num = 1337;
  const bool = boolean;
  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 */
  