How to find the sum from 1 to 100 in javascript

Javascript method to find the sum from 1 to 100: 1. Create an HTML sample file and add a script tag; 2. Use "for(i=1;i<=100;i){sum=sum i }" statement can be used to find the sum from 1 to 100.

The operating environment of this article: windows7 system, javascript version 1.8.5, Dell G3 computer.

How to find the sum from 1 to 100 in javascript?

very simple!

The js code is as follows:

<script>
    var sum=0;
for(i=1;i<=100;i++){
    sum=sum+i
}
document.write(sum);
//计算结果是5050
</script>

Run this code to get the cumulative sum from 1 to 100, 1 2 3 4... 100=5050.

We also The sum requirement can be encapsulated into a function, the code is as follows:

<script>
function add(start,end){
    var sum=0;
    for(i=start;i<=end;i++){
        sum=sum+i
    }
return sum;
 
}
document.write(add(1,100));
</script>

The running result is still 5050.

Video tutorial recommendation: "javascript basic tutorial"

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