Part -2 Control Flow Statement

why we use break in Switch cases?

If the break statement is not used, JavaScript continues executing the next cases even when a match is found. This behavior is called fall-through.

example

let day = 1;

switch (day) {

case 1:

console.log("sunday")

        case 2:

            console.log("monday")



        case 3:

            console.log("tuesday")

        default:

            console.log("invalid day")

output

sunday

monday

tuesday

invalid day

Default

The default block is optional in a switch statement. It is used to execute code when none of the cases match the given value. Without a default block, no code runs if there is no matching case.

Terrinary Operator

A ternary operator is a shorthand way of writing a simple if...else statement in JavaScript.

It is called ternary because it uses 3 parts:

condition ? valueIfTrue : valueIfFalse

program

let age = 20;

let result = age >= 18 ? "Adult" : "Minor";



console.log(result);



output:

Adult