How to add two variables without making it concatenated in javascript?

Question

a = document.CPU.Bfirst.value;

w = document.CPU.Afirst.value;

aa = a + w;

k = aa.sub();

document.write(k);

*I want the sum of the two values in a subscripted form but it only provides a concatenated value instead of the actual sum.

*Other variables:

    a = document.CPU.Bfirst.value;

    b = document.CPU.Bsecond.value;

    c = document.CPU.Bthird.value;

    d = document.CPU.Bfourth.value;

    w = document.CPU.Afirst.value;

    x = document.CPU.Asecond.value;

    y = document.CPU.Athird.value;

    z = document.CPU.Afourth.value;

    e = a - w;

    f = b - x;

    g = c - y;

    h = d - z;

    i = (e + f + g + h)/4;

    aa = a + w;

    bb = aa + x;

    cc = bb + y;

    dd = cc + z;

    j = w.sub();

    k = aa.sub();

    l = bb.sub();

    m = cc.sub();

    n = dd.sub();

*Form part:


    Enter all needed information:

    



Process

Arrival Time

Burst Time        





A

      







B

      







C

       







D

Please help me. i'm stucked at the addition part. – sfaw Mar 29 '15 at 02:38 — sfaw, Mar 29 '15 at 02:38

score 2 · Answer 1 · answered Mar 29 '15 at 02:08

2

If your values really are numbers, you can force the conversion with the unary + operator:

aa = +a + +w;

The value property of an <input> node will always give you a string, and the JavaScript + operator really likes strings.

answered Mar 29 '15 at 02:08

Pointy

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I've tried this code but it seems that it doesn't work for me. :( – sfaw Mar 29 '15 at 02:16
@sfaw you'll have to post more code then, because this will definitely work if the values really are strings that "look like" numbers. – Pointy Mar 29 '15 at 02:17
Can I have your email? I'll send my codes to you so you can help me more. – sfaw Mar 29 '15 at 02:21
@sfaw no, you should post your stuff here. – Pointy Mar 29 '15 at 03:43

DrKey · Answer 2 · 2015-03-29T02:31:54.243

2

If a and w are INT, you can use parseInt()

aa = parseInt(a) + parseInt(w)

If vars are float use parseFloat() instead.

JSFiddle

edited Mar 29 '15 at 02:31

answered Mar 29 '15 at 02:11

DrKey

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I also tried this but it doesn't work for me either. :( – sfaw Mar 29 '15 at 02:21
I added a fiddle and it seems to work.. – DrKey Mar 29 '15 at 02:32
Have you tried it using my codes? – sfaw Mar 29 '15 at 02:39
Does it need any software requirements? Coz I think parseInt() doesn't work for me. – sfaw Mar 29 '15 at 02:51
I think this works when you put a fixed value of your variables. But in my case, you have to put a random value so I think this makes the parseInt() doesn't work. – sfaw Mar 29 '15 at 03:17
What do you mean with 'fixed value'? However for parseInt() you can refer to http://www.w3schools.com/jsref/jsref_parseint.asp – DrKey Mar 29 '15 at 18:21

How to add two variables without making it concatenated in javascript?

Enter all needed information:

2 Answers2