Node.js – Console

Node.js console is a global object and is used to print different levels of messages to stdout and stderr. There are built-in methods to be used for printing informational, warning, and error messages. It is used in synchronous way when the destination is a file or a terminal and in asynchronous way when the destination is a pipe. 
Console Methods: 
Following is a list of methods available with the console global object.
Sr.No.
Method & Description
1
console.log([data][, ...])
Prints to stdout with newline. This function can take multiple
arguments in a printf()-like way
2
console.info([data][, ...])
Prints to stdout with newline. This function can take multiple
arguments in a printf()-like way.
3
console.error([data][, ...])
Prints to stderr with newline. This function can take multiple
arguments in a printf()-like way.
4
console.warn([data][, ...]) Prints to stderr with newline. This function can take multiple arguments in a printf()-like way
5
console.dir(obj[, options])
Uses util.inspect on obj and prints resulting string to stdout.
6
console.time(label)
Mark a time.
7
console.timeEnd(label)
Finish timer, record output.
8
console.trace(message[, ...])
Print to stderr 'Trace :', followed by the formatted message and
stack trace to the current position.
9
console.assert(value[, message][, ...])
Similar to assert.ok(), but the error message is formatted as
util.format(message...).