Angular 10 formatNumber() Method

In this article, we are going to see what is formatNumber in Angular 10 and how to use it.

formatNumber is used to format a number based on our requirement in decimal form.

Syntax:

formatNumber(value, locale, digitsInfo)

Parameters:

• value: The number to format.
• locale: A locale code for the locale format.
• digitsInfo: Decimal representation options.

Return Value:

• string: the formatted text string.

NgModule: Module used by formatNumber is:

• CommonModule

Approach: 

• Create the Angular app to be used.
• In app.module.ts import LOCALE_ID because we need locale to be imported for using get formatNumber.

  import { LOCALE_ID, NgModule } from '@angular/core';

• In app.component.ts import formatNumber and LOCALE_ID
• inject LOCALE_ID as a public variable.
• In app.component.html show the local variable using string interpolation
• Serve the angular app using ng serve to see the output.

Example 1:

app.component.ts

import {
  formatNumber
 }
  from '@angular/common';

import {Component,
  Inject,
  LOCALE_ID }
  from '@angular/core';

@Component({
selector: 'app-root',
templateUrl: './app.component.html'
})
export class AppComponent {
curr = formatNumber(1000,this.locale,
          '7.1-5');
constructor(
  @Inject(LOCALE_ID) public locale: string,){}
}

app.component.html

<h1>
  GeeksforGeeks
</h1>

<p>Locale Number is : {{curr}}</p>

Output:

Example 2:

app.component.ts

import {
  formatNumber
 }
  from '@angular/common';

import {Component,
  Inject,
  LOCALE_ID }
  from '@angular/core';

@Component({
selector: 'app-root',
templateUrl: './app.component.html'
})
export class AppComponent {
curr = formatNumber(100,this.locale,
          '2.1-5');
constructor(
  @Inject(LOCALE_ID) public locale: string,){}
}

app.component.html

<h1>
  GeeksforGeeks
</h1>

<p>Locale Number is : {{curr}}</p>

Output:

Example 3:

app.component.ts

import {
  formatNumber
 }
  from '@angular/common';

import {Component,
  Inject,
  LOCALE_ID }
  from '@angular/core';

@Component({
selector: 'app-root',
templateUrl: './app.component.html'
})
export class AppComponent {
curr = formatNumber(3234,this.locale,
          '3.1-4');
constructor(
  @Inject(LOCALE_ID) public locale: string,){}
}

app.component.html

<h1>
  GeeksforGeeks
</h1>

<p>Locale Number is : {{curr}}</p>

Output:

Reference: https://angular.io/api/common/formatNumber