JavaScript Code

If-Else Statement

if (condition) {
  //code
} else {
  //code
}

• if is keyword
• condition is a boolean expression
• else is keyword
• code is any valid JavaScript code

if condition is true, then if-block code is run. if condition is false, then else-block code is run.

Examples

1. Using if-else statement to check if a is even or not.

a = 10;

if (a%2 == 0) {
  console.log("a is even.");
} else {
  console.log("a is not even.");
}

2. Using if-else statement to check if supplies are good, or more supplies are needed.

supplies = 10;

if (supplies > 5) {
  console.log("Supplies are good.");
} else {
  console.log("Need more supplies.");
}