How to Use Basic Input and Output in JavaScript

1. To output data to the console, use the console.log() function. You can pass a string or a variable as an argument to console.log(). For example:

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console.log('Hello, world!');

let message = 'Hello, world!';
console.log(message);

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2. To get input from the user, use the prompt() function. This function will display a dialog box with a message and a text field, and it will return the value entered by the user as a string. For example:

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let name = prompt('What is your name?');
console.log(`Hello, ${name}!`);

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3. To display a dialog box with a message and a OK/Cancel button, use the confirm() function. This function will return true if the user clicks OK, and false if the user clicks Cancel. For example:

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let result = confirm('Do you want to continue?');
if (result) {
console.log('User clicked OK');
} else {
console.log('User clicked Cancel');
}

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