How to create a repeatString Function [duplicate]

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
– Nicholas Tower, Commented Oct 9, 2017 at 19:51
function repeatString(s, num) { if(num > 1) { s += ' '+ repeatString(s, num-1); } return s; } Here is a recursive approach. — Anjil Dhamala
– Anjil Dhamala, Commented Oct 9, 2017 at 20:02

Mureinik · Accepted Answer · 2017-10-09 19:52:20Z

1

You could simply call the repeat method:

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

answered Oct 9, 2017 at 19:52

Mureinik

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2 Comments

Igor Soloydenko Over a year ago

You were faster! And here's the documentation: developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/…

Alexander O'Mara Over a year ago

Be advised no versions of Internet Explorer support this, so a polyfill may be needed.

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