Node.js slice() function

Node.js console.warn() Function

Last Updated : 14 Oct, 2021

The console.warn() function from console class of Node.js is used to display the warning messages on the console. It prints to stderr with newline.

Note: This function is an alias of console.error() function.

Syntax:

console.warn( [data][, ...args] )

Parameter: This function can contains multiple parameters. The first parameter is used for the primary message and other parameters are used for substitution values.

Return Value: The function returns the warning message.

Below programs demonstrate the working of the console.warn() function:

Program 1:

function displayWarning(x) { 
    console.warn(`GeeksforGeeks is a ${x} portal`); 
} 
   
const x = 'Computer Science'; 
  
displayWarning(x); 

Output:

GeeksforGeeks is a Computer Science portal

Program 2:

function compareNumber(x, y) { 
      
    // Check condition 
    if (x > y) { 
        console.warn(`${x} is greater then ${y}`); 
    } 
    else { 
        console.warn(`${x} is less then or equal to ${y}`); 
    } 
} 
  
// Store number to variable 
x = 100; 
y = 50; 
  
compareNumber(x, y); 

Output:

100 is greater then 50

Node.js slice() function

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