Instructions for using the console.log method in node.js_node.js

Method description:

Print characters to the standard output stream, terminated by a newline character.

Grammar:

Copy code The code is as follows:

console.log([data], [...])

Receive parameters:

console.log accepts several parameters. If there is only one parameter, the string form of this parameter will be output.

If there are multiple parameters, it will be output in a format similar to the C language printf() command.

With no arguments, just print a newline character.

Example:

Copy code The code is as follows:

var count = 1234;
console.log('count: %d', count);
//Output result count : 1234;
console.log('Hello world');
//Output result Hello world;
console.log('count: %d');
//Output result count: %d;

Source code:

Copy code The code is as follows:

Console.prototype.log = function() {
This._stdout.write(util.format.apply(this, arguments) 'n');
};