locutus/c/ctype/isdigit.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.isdigit = isdigit;
function isdigit(c) {
    //      discuss at: https://locutus.io/c/ctype/isdigit/
    // parity verified: C 23
    //     original by: Kevin van Zonneveld (https://kvz.io)
    //          note 1: Checks if the character is a decimal digit (0-9).
    //       example 1: isdigit('5')
    //       returns 1: true
    //       example 2: isdigit('0')
    //       returns 2: true
    //       example 3: isdigit('A')
    //       returns 3: false
    c = (c + '').charAt(0);
    return /^[0-9]$/.test(c);
}