If...Else Statements

The if...else statement provides a way to execute one block of code if a condition is true and another block of code if the condition is false. It allows for branching within our code, making it more dynamic and flexible.

1if (condition) {
2  // code to be executed if the condition is true
3} else {
4  // code to be executed if the condition is false
5}

Examples and Syntax

Let's take a look at some examples to better understand the syntax and usage of if...else statements.

1let num = -5;
2
3if (num >= 0) {
4  console.log("The number is positive or zero.");
5} else {
6  console.log("The number is negative.");
7}

Nesting If...Else Statements

We can also nest if...else statements within each other to create more complex conditions and decision-making processes.

1let num = 10;
2
3if (num > 0) {
4  console.log("The number is positive.");
5} else {
6  if (num < 0) {
7    console.log("The number is negative.");
8  } else {
9    console.log("The number is zero.");
10  }
11}