In order to facilitate the input and output information, JS provides some input output statement, the statements which commonly follows:
| method | Explanation | Attributable |
|---|---|---|
| alert(msg) | Browser pop-up alert box | Browser |
| console.log(msg) | Browser console printout information | Browser |
| prompt(info) | Browser popup input box, the user can enter | Browser |
- Note: alert () is mainly used to display messages to the user, console.log () messages to the programmer to see their own operation.