TypeScript continue Statement

Introduction

In this chapter, we will explore the continue statement in TypeScript. The continue statement is used to skip the rest of the code inside a loop for the current iteration and move to the next iteration. Understanding how to use the continue statement is essential for managing loop iterations in TypeScript programs.

Table of Contents

• Definition
• Continue Statement Syntax
• Using Continue in For Loops
• Using Continue in While Loops
• Nested Loops with Continue
• Complete Example with Output
• Conclusion

Definition

The continue statement skips the rest of the code inside a loop for the current iteration and proceeds with the next iteration of the loop.

Continue Statement Syntax

Syntax

continue;

Example

This example demonstrates using the continue statement to skip printing the number 3 in a loop.

for (let i = 0; i < 5; i++) {
  if (i === 3) {
    continue;
  }
  console.log(i);
}

Output

0
1
2
4

Using continue Statement in for Loop

The continue statement can be used in a for loop to skip the current iteration when a specified condition is met.

Example

This example uses the continue statement to skip printing even numbers in a for loop.

for (let i = 0; i < 10; i++) {
  if (i % 2 === 0) {
    continue; // Skip even numbers
  }
  console.log(i);
}

Output

1
3
5
7
9

Using continue Statement in while Loop

The continue statement can also be used in a while loop to skip the rest of the code inside the loop for the current iteration.

Example

This example uses the continue statement to skip printing the number 3 in a while loop.

let num: number = 0;

while (num < 5) {
  num++;
  if (num === 3) {
    continue; // Skip the rest of the loop when num equals 3
  }
  console.log(num);
}

Output

1
2
4
5

Nested Loops with continue Statement

The continue statement can be used in nested loops to control the flow of iterations in both the inner and outer loops.

Example

This example demonstrates using the continue statement in nested loops to skip printing the product of numbers when the inner loop index is 2.

for (let i = 1; i <= 3; i++) {
  for (let j = 1; j <= 3; j++) {
    if (j === 2) {
      continue; // Skip the inner loop iteration when j equals 2
    }
    console.log(`${i} * ${j} = ${i * j}`);
  }
}

Output

1 * 1 = 1
1 * 3 = 3
2 * 1 = 2
2 * 3 = 6
3 * 1 = 3
3 * 3 = 9

Complete Example with Output

In this section, we will combine the examples into a single TypeScript file, compile it to JavaScript, and run it to see the output.

TypeScript Code

You can test the following code in the TypeScript Playground:

// Using Continue in For Loops
for (let i = 0; i < 10; i++) {
  if (i % 2 === 0) {
    continue; // Skip even numbers
  }
  console.log(i); // Output: 1, 3, 5, 7, 9
}

// Using Continue in While Loops
let num: number = 0;

while (num < 5) {
  num++;
  if (num === 3) {
    continue; // Skip the rest of the loop when num equals 3
  }
  console.log(num); // Output: 1, 2, 4, 5
}

// Nested Loops with Continue
for (let i = 1; i <= 3; i++) {
  for (let j = 1; j <= 3; j++) {
    if (j === 2) {
      continue; // Skip the inner loop iteration when j equals 2
    }
    console.log(`${i} * ${j} = ${i * j}`); // Output: 1 * 1 = 1, 1 * 3 = 3, ... , 3 * 3 = 9
  }
}

Conclusion

In this chapter, we covered the continue statement in TypeScript, including how to use it in for loops, while loops, and nested loops. We provided a complete example with its output to illustrate how the continue statement works in TypeScript. Understanding the continue statement is essential for managing loop iterations in TypeScript programs.