Javascript variables math

Question

I am making a game with javascript where you can buy fish and I am trying to figure out how to make it so that when function agf() is executed the number in <p id="money">10</p> is subtracted by 2. So far I have tried:

var m=document.getElementById('money').value;
function agf() {
  if(m>1) {
    var pay=(m-2);
    document.getElementById('money').innerhtml=pay;

I am trying to do the same thing with addition now but it is not working. I tried switching var pay=(m-2); to var sell=(m+2); and then document.getElementById('money').innerHTML=pay; has sell at the end instead of pay. — user2872498
– user2872498, Commented Oct 26, 2013 at 15:21

Blue Skies · Accepted Answer · 2013-10-26 14:46:26Z

2

Fetching the current value should be done inside the function so that you're always getting the current value.
The .value should be .innerHTML or .textContent.
To be safe, you should convert the value to a number.
The second .innerhtml should be innerHTML (notice the capitalization).
You're missing closing brackets

function agf() {
    var m=Number(document.getElementById('money').innerHTML);
    if(m>1) {
        var pay=(m-2);
        document.getElementById('money').innerHTML=pay;
    }
}

answered Oct 26, 2013 at 14:46

Blue Skies

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