Node.js console.warn() Function
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(`w3wiki is a ${x} portal`); } const x = 'Computer Science'; displayWarning(x); |
Output:
w3wiki is a Computer Science portal
Program 2:
function compareNumber(x, y) { // Check condition if (x > y) { console.warn(`${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