# JavaScript: Print an integer with commas as thousands separators

## JavaScript Math: Exercise-39 with Solution

Write a JavaScript function to print an integer with thousands separated by commas.

Test Data:
console.log(thousands_separators(1000));
"1,000"
console.log(thousands_separators(10000.23));
"10,000.23"
console.log(thousands_separators(100000));
"100,000"

Sample Solution:-

HTML Code:

``````<!DOCTYPE html>
<html>
<meta charset="utf-8">
<title>JavaScript function to print an integer with commas as thousands separators</title>
<body>

</body>
</html>
```
```

JavaScript Code:

``````function thousands_separators(num)
{
var num_parts = num.toString().split(".");
num_parts[0] = num_parts[0].replace(/\B(?=(\d{3})+(?!\d))/g, ",");
return num_parts.join(".");
}

console.log(thousands_separators(1000));
console.log(thousands_separators(10000.23));
console.log(thousands_separators(100000));
```
```

Sample Output:

```1,000
10,000.23
100,000
```

Pictorial Presentation:

Flowchart:

Live Demo:

See the Pen javascript-math-exercise-39 by w3resource (@w3resource) on CodePen.

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