JavaScript(JS) console.log()
console.log()
is a built-in function in JavaScript that is used to output information to the console. The console is a debugging tool that is built into most modern web browsers, and it allows developers to see what's happening behind the scenes in their code.
The console.log()
function takes one or more arguments, which can be any type of data, such as strings, numbers, or objects. When you call console.log()
, the argument(s) are printed to the console. Here are some examples:
console.log("Hello, world!"); // Output: Hello, world! const x = 10; console.log(x); // Output: 10 const person = { name: "John", age: 30 }; console.log(person); // Output: { name: "John", age: 30 }
In the first example, we passed a string as an argument to console.log()
, and it was printed to the console. In the second example, we passed a variable that holds a number, and in the third example, we passed an object.
console.log()
is a very useful tool for debugging and understanding how your code is executing. You can use it to print the value of variables at different points in your code, or to see the output of functions and methods. By examining the output in the console, you can get a better understanding of what's happening in your code and find and fix errors.