04-ConditionalStatements.js

/* Example 01 - if */
var num = 1;
if (num == 1) {
    console.log("num is equal to 1");
}

/* Example 02 - if-else */
var num = 0;
if (num == 1) {
    console.log("num is equal to 1");
} else {
    console.log("num is not equal to 1, the value of num is " + num);
}

/* Example 03 - if-else-if-else... */
var month = 5;
if (month == 1) {
    console.log("January");
} else if (month == 2){
    console.log("February");
} else if (month == 3){
    console.log("March");
} else {
    console.log("Month is not January, February or March");
}

/* Example 04 - switch */
var month = 5;
switch(month) {
    case 1:
        console.log("January");
        break;
    case 2:
        console.log("February");
        break;
    case 3:
        console.log("March");
        break;
    default:
        console.log("Month is not January, February or March");
}