[FIXED] How to make a function which takes 5 and return 9, and takes 9 and return 5 without any logical and conditional operators like if-else and TO

Issue

I have tried this but I thought switch is also a conditional statement

    function cal(n){
      switch(n){
      case 5: 
        return 9;
        break;
      case 9:
        return 5;
        break;
     }
    }

Solution

This can be done with bitwise XOR ^

function fn(n) {
  return n ^ 0b1100;
}

console.log(fn(5));
console.log(fn(9));

a	b	a XOR b
0	0	0
1	0	1
0	1	1
1	1	0

The number 5 in decimal is 101 in binary, which means that

     101 
XOR 1101
--------
    1001 = (9 decimal)

The number 9 in decimal is 1001 in binary, which means that

    1001 
XOR 1101
--------
    0101 = (5 decimal)

0b1100 itself is just a numeric literal expressed in binary. It is equal to 12 in decimal, so n ^ 12 will work exactly the same way.

Answered By - VLAZ

Answer Checked By - David Goodson (PHPFixing Volunteer)