How to avoid concatenation in javascript

Question

1.00/5 (1 vote)

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var a = prompt("Input a number");
var b = prompt("Input second number");
var c = "a" + "b";
alert(a + b);

JavaScript

What I have tried:

Now I have tried typing two numbers and they don't add up. Example 5 + 5 is supposed to be 10 but it shows as 55. What am I suppose to do here?

Posted 26-Mar-18 23:42pm

Member 13748876

Updated 27-Mar-18 0:21am

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2 solutions

Solution 3

Go to JavaScript Variables[^] and study the documentation. Javascript is a much more dynamic language than most.

Posted 27-Mar-18 0:22am

Richard MacCutchan

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Bryian Tan · Accepted Answer · 2018-03-26T23:46:00

Solution 1

You need to change the code to parse the input to integer. Here is an example. JavaScript parseInt() Function[^]

Posted 26-Mar-18 23:46pm

Bryian Tan

Comments

Member 13748876 27-Mar-18 5:54am

But this only allows predefined values for the variables. What if I want the suers to put their own value after they run the code?

Richard Deeming 27-Mar-18 8:40am

var a = parseInt(prompt("Input a number"), 10);

Member 13748876 27-Mar-18 10:24am

Thank you so much! It finally worked!