# How to convert long number into abbreviated string in JavaScript ?

In this article, we are given a long number and the task is to convert it to the abbreviated string(eg.. 1234 to 1.2k). Here 2 approaches are discussed with the help of JavaScript.

## Approaches to Convert Long Number to Abbreviated String:

• using JavaScript methods
• using Custom function

## Approach 1:

• Get the characters in an array(ar = [“”, “k”, “m”, “b”])
• Divide the length of the number by 3 and get the value in var(sNum).
• If the sNum != 0 then calculate the precise value of the number by dividing it by 1000^sNum.
• Append the character at index = sNum in the array, to the precise value to finally get the abbreviated number.

Example 1: This example implements the above approach.

## Javascript

 `// Input number ` `let n = 123287342;` `// Display input number` `console.log(n);`   `// Function to convert number` `function` `convert(val) {` `    ``// Thousands, millions, billions etc..` `    ``let s = [``""``, ``"k"``, ``"m"``, ``"b"``, ``"t"``];`   `    ``// Dividing the value by 3.` `    ``let sNum = Math.floor((``""` `+ val).length / 3);`   `    ``// Calculating the precised value.` `    ``let sVal = parseFloat(` `        ``(sNum != 0` `            ``? val / Math.pow(1000, sNum)` `            ``: val` `        ``).toPrecision(2)` `    ``);`   `    ``if` `(sVal % 1 != 0) {` `        ``sVal = sVal.toFixed(1);` `    ``}`   `    ``// Appending the letter to precised val.` `    ``return` `sVal + s[sNum];` `}`   `// Function to show converted output` `function` `GFG_Fun() {` `    ``// Display output` `    ``console.log(``"Number = "` `+ convert(n));` `}`   `GFG_Fun();`

Output

```123287342
Number = 0.1b
```

## Approach 2:

• Check if the number is less than 1e3, if it is then return the number as it is.
• If the number is greater than or equal to 1e3 and less than 1e6 then remove the last three digits and append the character ‘K’ to it.
• If the number is greater than or equal to 1e6 and less than 1e9 then remove the last six digits and append the character ‘M’ to it.
• If the number is greater than or equal to 1e9 and less than 1e12 then remove the last nine digits and append the character ‘B’ to it.
• If the number is greater than or equal to 1e12 remove the last 12 digits and append the character ‘T’ to it.

Example 2: This example implements the above approach.

## Javascript

 `// Input number` `let n = 1232873425;`   `// Display input number` `console.log(n);`   `// Function to convert` `let convert = (n) => {` `    ``if` `(n < 1e3) ``return` `n;` `    ``if` `(n >= 1e3 && n < 1e6)` `        ``return` `+(n / 1e3).toFixed(1) + ``"K"``;` `    ``if` `(n >= 1e6 && n < 1e9)` `        ``return` `+(n / 1e6).toFixed(1) + ``"M"``;` `    ``if` `(n >= 1e9 && n < 1e12)` `        ``return` `+(n / 1e9).toFixed(1) + ``"B"``;` `    ``if` `(n >= 1e12) ``return` `+(n / 1e12).toFixed(1) + ``"T"``;` `};`   `// Function to display converted output` `function` `GFG_Fun() {` `    ``// Display output` `    ``console.log(``"Number = "` `+ convert(n));` `}`   `// Funcion call` `GFG_Fun();`

Output

```1232873425
Number = 1.2B
```

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