Javascript program to swap two numbers without using temporary variable

// Javascript program to swap two
    // numbers without using temporary
    // variable
  
    let x = 10, y = 5;
    console.log("Before Swapping: x = " + 
        x + ", y = " + y);
  
    // Code to swap 'x' and 'y'
  
    // x now becomes 15
    x = x + y;
  
    // y becomes 10
    y = x - y;
  
    // x becomes 5
    x = x - y;
  
    console.log("After Swapping: x = " + 
        x + ", y = " + y);