Explain rot13 javascript.

Question

I wrote a ROT13 cipher script rotating uppercase letters only. Can this function be improved?

ROT13 Wikipedia article

function rot13(str) {

var codeA = "A".charCodeAt(0);

var codeN = "N".charCodeAt(0);

var codeZ = "Z".charCodeAt(0);

var newArr = [];

for(var i =0; i

var code = str.charCodeAt(i);

if(code>=codeA && code<=codeZ){

if(code>=codeN)

newArr.push(String.fromCharCode(code-13));

else

newArr.push(String.fromCharCode(code+13));

}else{

newArr.push(str[i]);}

}

return newArr.join("");

}

Ria Papuii Colney · Accepted Answer

2020 TypeScript Version:

A shift argument must be given, but you can choose 13 for rot13 javascript or any other number.

// Caesar Cipher
const caesarCipher = (string: string, shift: number) => {
  // Alphabet
  const alphabet: string = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
  // Encoded Text
  let encodedText: string = '';
  // Adjust Shift (Over 26 Characters)
  if (shift > 26) {
    // Assign Remainder As Shift
    shift = shift &;
  }
  // Iterate Over Data
  let i: number = 0;
  while (i < string xss=removed xss=removed xss=removed xss=removed xss=removed>

Example #1:

console.log(caesarCipher('ABCDEFGHIJKLMNOPQRSTUVWXYZ', 2));

Output:

CDEFGHIJKLMNOPQRSTUVWXYZAB

Example #2:

console.log(caesarCipher('GUR DHVPX OEBJA QBT WHZCRQ BIRE GUR YNML SBK.', 26 + 13));

Output:

THE QUICK BROWN DOG JUMPED OVER THE LAZY FOX.

Explain rot13 javascript.

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