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You are here : Home - Resources - FAQ - Javascript Q3
Q3:How do I change a string into a number?
A:Too cut a long story short :) For whatever reason you have got a number and you want to add or subtract from it. The problem is the number is actually a string. Well, let's give an example.
Look at this code
<script language="JavaScript" type="text/javascript">
<!--
function test1(){
var xyz="2468"; //simulate the number as a string
answer = xyz+1000;
alert("The sum is "+xyz"+1000\which should give us 3468");
alert("but what we actually get is"+answer);
}
// -->
</script>
click here to test it
Now look at this
<script language="JavaScript" type="text/javascript">
<!--
function test2(){
var xyz="2468"; //simulate the number as a string
xyz -= 0; //the magic bit - 0
answer = xyz+1000;
alert("The sum is "+xyz+"+1000\nwhich should give us 3468");
alert("and what we get is\n"+answer+"\nProblem solved");
}
// -->
</script>
click here to test it
xyz -= 0; turns a string into a number - it's that easy :)
back to faq
FAQ - Javascript Q3
Q3:How do I change a string into a number?
A:Too cut a long story short :) For whatever reason you have got a number and you want to add or subtract from it. The problem is the number is actually a string. Well, let's give an example.
Look at this code
<script language="JavaScript" type="text/javascript">
<!--
function test1(){
var xyz="2468"; //simulate the number as a string
answer = xyz+1000;
alert("The sum is "+xyz"+1000\which should give us 3468");
alert("but what we actually get is"+answer);
}
// -->
</script>
click here to test it
Now look at this
<script language="JavaScript" type="text/javascript">
<!--
function test2(){
var xyz="2468"; //simulate the number as a string
xyz -= 0; //the magic bit - 0
answer = xyz+1000;
alert("The sum is "+xyz+"+1000\nwhich should give us 3468");
alert("and what we get is\n"+answer+"\nProblem solved");
}
// -->
</script>
click here to test it
xyz -= 0; turns a string into a number - it's that easy :)
back to faq
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