Question

I’m trying to make a Javascript function that will take a mathematical expression and apply it to a predefined number, for example:

var myNum = 10;

function EQ(eq){
// code here 
}

For example the input should me something like this:

EQ("*100/10"); //output 100
EQ("+100");    //output will be 110
EQ("-+=1");    //output false

Is there any way to do that?
Thanks

Answer 1

You could probably work eval() into a simple solution. For instance:

var myNum = 10;

function EQ(eq) { return eval(myNum+eq); }

alert( EQ("*100/10") ); // outputs 100

I’d encourage you to expand upon this by implementing a try-catch and handling exceptions.