Using Console.log in Node.js

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In Node.js, the console.log() method is commonly used to print values to the console for debugging purposes. This method can take multiple arguments and print them to the console as a space-separated string.

Syntax

The basic syntax for using console.log() is as follows:

console.log(value1 [, value2, ..., valueN]);

Here, value1, value2, ..., valueN are the values that you want to print to the console.

Example

Let's see an example of using console.log() to print different types of values:

// Print a simple string
console.log("Hello, Cratecode!");

// Print a number
console.log(42);

// Print an array
console.log([1, 2, 3, 4, 5]);

// Print an object
console.log({name: "John", age: 30});

// Print multiple values
console.log("Name:", "John", "Age:", 30);

Output

When you run the above code, you will see the following output in the console:

Hello, Cratecode!
42
[ 1, 2, 3, 4, 5 ]
{ name: 'John', age: 30 }
Name: John Age: 30

Now you know how to use console.log() to print values to the console in Node.js. This method can be very helpful for debugging your code and understanding the flow of your program.

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FAQ

What is console.log() in Node.js?

console.log() is a built-in method in Node.js that allows you to print values to the console. It is widely used for debugging purposes, as it helps you to visualize the data and track the flow of your application.

How do I use console.log() in my Node.js application?

To use console.log() in your Node.js application, simply call the method and pass the value you want to print as an argument. For example:

console.log("Hello, World!");
console.log(42);
console.log({"name": "Alice", "age": 30});

Can I print multiple values in one console.log() call?

Yes, you can print multiple values in one console.log() call by passing multiple arguments separated by commas. For example:

console.log("Name:", "Alice", "Age:", 30);

This will print "Name: Alice Age: 30" in the console.

How to format console.log() output using template literals?

You can use template literals (backticks) and placeholders (${expression}) to format the output of console.log(). For example:

const name = "Alice";
const age = 30;
console.log(`Name: ${name}, Age: ${age}`);

This will print "Name: Alice, Age: 30" in the console.

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