How to create a repeatString Function

Question

so I am very new to js and I'm having a really hard time comprehending the language. Could anyone take 5 to look at this code and tell me why my function isn't working...? The goal is to create a function that duplicates a string by the number inputted into the function.

function repeatString(string, num) {
return string*num
}
var output=repeatString("Hello!",2);
console.log(output);

the `*` operator, when used with a string and a number, results in NaN. Perhaps use String.concat (or string.repeat if you want to cheat) — Nicholas Tower, Oct 09 '17 at 19:51
function repeatString(s, num) { if(num > 1) { s += ' '+ repeatString(s, num-1); } return s; } Here is a recursive approach. — Anjil Dhamala, Oct 09 '17 at 20:02

score 1 · Answer 1 · answered Oct 09 '17 at 19:52

1

You could simply call the repeat method:

function repeatString(string, num) {
    return string.repeat(num);
}

answered Oct 09 '17 at 19:52

Mureinik

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You were faster! And here's the documentation: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat – Igor Soloydenko Oct 09 '17 at 19:53
Be advised no versions of Internet Explorer support this, so a polyfill may be needed. – Alexander O'Mara Oct 09 '17 at 19:54

How to create a repeatString Function

1 Answers1