Control Flow in JavaScript

if-else statements

These are used to perform different actions based on different conditions.

if (condition1) {
    // Code to be executed if condition1 is true
} else if (condition2) {
    // Code to be executed if condition1 is false and condition2 is true
} else {
    // Code to be executed if both condition1 and condition2 are false
}

switch-case statements

These are used to perform different actions based on different cases.

switch(expression) {
    case value1:
        // Code to be executed if expression equals value1
        break;
    case value2:
        // Code to be executed if expression equals value2
        break;
    ...
    default:
        // Code to be executed if expression doesn't match any cases
}

Ternary operator (? ... : ...;)

This is a shorthand way to write simple if-else statements. It takes three operands: a condition, a statement to execute if the condition is true, and a statement to execute if the condition is false.

condition ? statement_if_true : statement_if_false;

Here’s an example of how you might use it:

let age = 15;
let type = age >= 18 ? 'Adult' : 'Minor';

In this example, if age is greater than or equal to 18, type will be ‘Adult’. Otherwise, type will be ‘Minor’.