How to Print a Message to the Error Console Using JavaScript ? (original) (raw)

Last Updated : 18 Oct, 2023

This article will show you how to print a message using JavaScript on the error console. There are three methods to display the error console, these are:

Table of Content

• Using console.error() Method
• Using console.warn() Method
• Using console.info() Method

Approach 1: Using console.error() Method

The console.error() method is used to display an error message on the console. This method is used for testing purposes. The error message is sent as a parameter to the console.error() method.

**Syntax:

console.error( message );

**Example:

JavaScript `

const x = 20;

if (x != 30) { console.error('%d is not equal to 30', x); } else { console.error('%d is equal to 30', x); }

`

**Output:

20 is not equal to 30

Approach 2: Using console.warn() Method

The console.warn() method is used to write a warning message in the console. To check the warning message, open the console panel to display the output (warning message).

**Syntax:

console.warn( message )

**Example:

JavaScript `

let str = ["Welcome to GeeksforGeeks"]; console.warn(str);

`

**Output:

Welcome to GeeksforGeeks

Approach 3: Using console.info() Method

The console.info() method is used to write a message in the console. It indicates an important message about any element or object. The message is sent as a parameter to the console.info() method.

**Syntax:

console.info( message )

**Example:

JavaScript `

let str = ["Welcome to GeeksforGeeks"]; console.info(str);

`

Output

[ 'Welcome to GeeksforGeeks' ]