So I am trying to get a button to display the result of a math expression. The problem is that the math expression is stored in a string. This is the code:
function bEqu(){
var test = "2 + 2";
document.getElementById("numButtons").innerHTML += "<br>" + test;
//I am trying to get it to return 4.
}
Just eval it.
document.getElementById("numButtons").innerHTML += "<br>" + eval(test);
However, keep it in mind that use eval only for simple math calculations and not for anything else because eval is evil.
function bEqu(){
var test = "2 + 2";
document.getElementById("numButtons").innerHTML += "<br>" + eval(test);
//You have returned 4.
//using eval(test);
}
eval(test) gives you the proper result 4.
