Question

I am making a calculator which will work as follows:
the user will put his calculation in a textbox eg: 2+4+5; then the whole string will be converted to integer and calculate the numbers and display the result:11;.
My code is as follows:

Script:

function solve() {  
    problem = parseInt(document.getElementById('prob'));   
    ans = document.getElementById('ansspace');  
    ans.innerHTML = problem  
}  

HTML:

<input type="text" id="prob">  
<br>  <input type="button" id="add" value="Add" onclick="solve()">  <br>  
<p id='ansspace'></p>

Answer 1

There’s really no easy way to make an calculator but for your code to work you can use eval:

function solve() {  
  var problem = document.getElementById('prob').value;   
  var ans = document.getElementById('ansspace');   
  ans.innerHTML = eval(problem);  
}