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- JavaScript and Client-Side Browser Scripting (http://www.programmingforums.org/forum23.html)

- - Help plz (http://www.programmingforums.org/showthread.php?t=15445)

 <script> /*two dimensional arrays*/



var a=[];

var ctr;

var Maths=new Array(5);

var English=new Array(5);

var Total=(Maths[ctr]+English[ctr]);



for(ctr=0; ctr<5; ctr++)

{

        a[ctr]="Hello";

        Maths[ctr]=0;

        English[ctr]=0;

        Total[ctr]=0;

}



for(ctr=0; ctr<5; ctr++)

{

        a[ctr]=prompt("Enter Name");

        Maths[ctr]=prompt("Enter Math Grade");

        English[ctr]=prompt("Enter English Grade");

}

document.write("<TABLE Border=10 ALIGN=center>");

document.write("<TR>");

document.write("<TH>Name</TH>");

document.write("<TH>Maths Marks</TH>");

document.write("<TH>English Marks</TH>");

document.write("<TH>Total</TH>");

document.write("<TH>Average</TH>");

document.write("</TR>");



for(ctr=0; ctr<5; ctr++)

{

document.write("<TR>");

document.write("<TD>" + a[ctr] + "</TD>");

document.write("<TD>" + Maths[ctr] + "</TD>");

document.write("<TD>" + English[ctr] + "</TD>");

document.write("<TD>" + (Maths[ctr] + English[ctr]) + "</TD>");

document.write("<TD>" + (Maths[ctr] + English[ctr])/2 + "</TD>");

document.write("</TR>");

}



document.write("</TABLE>");



</script>

im trying to add Maths and English to create a total .. and also to find the average of Maths and English .. obviously im doing something wrong but i dont rly remember how to do this.. this is also my first time working with arrays

Alright, what you are doing is adding two strings together. So, 45 + 45 = 4545, you need 45 + 45 = 90. This is what you have to to.

<script> /*two dimensional arrays*/



var a=[];

var ctr;

var Maths=new Array(5);

var English=new Array(5);

var Total=(Maths[ctr]+English[ctr]);



for(ctr=0; ctr<5; ctr++)

{

        a[ctr]="Hello";

        Maths[ctr]=0;

        English[ctr]=0;

        Total[ctr]=0;

}



for(ctr=0; ctr<5; ctr++)

{

        a[ctr]=prompt("Enter Name");

        Maths[ctr]=prompt("Enter Math Grade");

        English[ctr]=prompt("Enter English Grade");

}

document.write("<TABLE Border=10 ALIGN=center>");

document.write("<TR>");

document.write("<TH>Name</TH>");

document.write("<TH>Maths Marks</TH>");

document.write("<TH>English Marks</TH>");

document.write("<TH>Total</TH>");

document.write("<TH>Average</TH>");

document.write("</TR>");



for(ctr=0; ctr<5; ctr++)

{

document.write("<TR>");

document.write("<TD>" + a[ctr] + "</TD>");

document.write("<TD>" + Maths[ctr] + "</TD>");

document.write("<TD>" + English[ctr] + "</TD>");

// This is the new code here.

document.write("<TD>" + (Number(Maths[ctr]) + Number(English[ctr])) + "</TD>");

document.write("<TD>" + (Maths[ctr] + English[ctr])/2 + "</TD>");

document.write("</TR>");

}



document.write("</TABLE>");



</script>

The Number() function turns a string into a number.

thanks a lot man it works:icon_mrgreen: