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need help with javascript

WannaBeeComputerGeek
By WannaBeeComputerGeek
in Programming
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<!DOCTYPE html>
<html>
<body>
<title>
Integer Values
</title>
<form id="num1">
1st Numerical:<input name="fnum" type="text" ><br>
</form>
<br>
<form id="num2">
2nd Numerical:<input name="snum" type="text" ><br>

</form>
<button onclick="rt()">RESET</button>
<button onclick="cmd()">COMMAND</button>


<script>

    function rt(){
    document.getElementById("num1").reset();
    document.getElementById("num2").reset();
    }
    function cmd(){
    var sum,temp1,temp2,x,y,sum,sub,mul,div;
    temp1=document.getElementById("num1");
    temp2=document.getElementById("num2");
    x=temp1.elements["fnum"].value;
    y=temp2.elements["snum"].value;
    sum=(parseInt(x)+parseInt(y));
    sub=(parseInt(x)-parseInt(y));
    document.getElementById("demo").innerHTML="The Sum is "+sum+"<br>";
    document.getElementById("demo").innerHTML+="The Difference is "+sub+"<br>";
    document.getElementById("demo").innerHTML+="The Product is "+mul+"<br>";
    document.getElementById("demo").innerHTML+="The Quotient is "+div+"<br>";
    }
</script>
<p id="demo">
</p>
</body>
</html>

 

 

 

 

 

it doesnt show the output for the sub,mul, and div HELPPPPPPPPPPPPP!!!!!!!!!!!!

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Posted

mul doesn't seem to be filled in this code, same for div and I would assume if the 1st and 2nd numerical inputs are left empty, sub wouldn't get filled with a value too.

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Oh Gosh, that's a mess, please comment the code and/or explain us what you want to achieve and how.

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2 minutes ago, Gachr said:

Oh Gosh, that's a mess, please comment the code and/or explain us what you want to achieve and how.

“Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live” - John Woods

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1 hour ago, FilipSebik said:

Best java help: Learn C++

Best advice: Don't listen to idiots who don't know Java and Javascript are completely different languages.

 

As far as I know you cannot use += with .innerHTML but seeing as you are printing these 4 lines in a row there is no reason you cant set the HTML in one go: 

var html = "The Sum is "+sum+"<br />The Difference is "+sub+"<br />The Product is "+mul+"<br />The Quotient is "+div+"<br />";
document.getElementById("demo").innerHTML= html;

 

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3 hours ago, Brenz said:

Best advice: Don't listen to idiots who don't know Java and Javascript are completely different languages.

 

As far as I know you cannot use += with .innerHTML but seeing as you are printing these 4 lines in a row there is no reason you cant set the HTML in one go: 


var html = "The Sum is "+sum+"<br />The Difference is "+sub+"<br />The Product is "+mul+"<br />The Quotient is "+div+"<br />";
document.getElementById("demo").innerHTML= html;

 

Ouch, i misread it and now iam the idiot

 

 

 

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+= is valid JS syntax: http://www.w3schools.com/js/js_operators.asp at least & works fine on my browser with innerHTML when I view that page.

 

The mul and div variables you declare in the var line but then they're never used until the output lines. I.e. there's no assignment like you've done with the sum or sub variable lines!

  

     x=parseInt(temp1.elements["fnum"].value);
     y=parseInt(temp2.elements["snum"].value);
     sum=(x+y);
     sub=(x-y);
     mul=(x*y);
     div=(x/y);

 

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