Check if string starts with a number [duplicate]

Question

How would I do something like this in javascript:

var s = '124sdg'; var f = 'hsdsda'; if (s.startsWith(a number)) {    // Return true } if (f.startsWith(a number)) {    // Return false } 

Answer 1

You can use a regular expression:

if (s.match(/^\d/)) {    // Return true } if (f.match(/^\d/)) {    // Return false }