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sakilk130/caesars-cipher-freecodecamp.js

Last active May 30, 2021 14:29
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FreeCodeCamp JavaScript Project
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caesars-cipher-freecodecamp.js
function rot13(str) {
const Acode = 'A'.charCodeAt();
const Ncode = 'N'.charCodeAt();
const Zcode = 'Z'.charCodeAt();
return [...str]
.map(function (e) {
const code = e.charCodeAt();
if (Acode <= code && code <= Zcode) {
if (code < Ncode) {
return String.fromCharCode(code + 13);
} else {
return String.fromCharCode(code - 13);
}
} else {
return e;
}
})
.join('');
}
rot13('SERR PBQR PNZC');
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