switch_example.js

var y = 200; // Assign 100 to y
switch(y){ // switch is taking 'y' as a value
    // to validate
    case 200: // will check if y == 200
        console.log("this is 200");
        break; // this will exit the switch block
    case 300: // will check if y == 300
        console.log("this is 300");
        break;
    default: // if none of the condition is true
    // it will execute the default case
        console.log("This is the default case");
        break;
}