Loops in Dart

Loops in Dart are used to perform repetitive tasks efficiently. They allow you to execute a block of code multiple times, either a fixed number of times or until a specific condition is satisfied.

In the below PDF we discuss about Types of Loops in detail in simple language, Hope this will help in better understanding.

Dart Programming

Types of Loops in Dart:

1. For Loop:
The for loop in Dart is similar to other programming languages like JavaScript and C. It’s primarily used for iterating over a range of values or elements in a collection. The syntax of a basic for loop in Dart looks like this:

for (initialization; condition; increment) {
// code to be executed

Here’s a breakdown of each part:

  • Initialization: Initialize a variable or counter before the loop starts.
  • Condition: Define the condition for executing the loop. If the condition evaluates to true, the loop continues; otherwise, it exits.
  • Increment: Update the loop variable after each iteration.


for (var i = 0; i < 5; i++) {
print('Value of i: $i');

2. While Loop:
The while loop in Dart repeatedly executes a block of code as long as a specified condition is true. Unlike the for loop, it doesn’t require an initialization step or an increment/decrement operation within the loop itself.

while (condition) {
// code to be executed


var count = 0;
while (count < 5) {
print('Count: $count');

3.  do-while Loop:
Similar to the while loop, the do-while loop in Dart executes a block of code at least once before evaluating the loop condition. It’s useful when you need to ensure that a block of code runs at least once, regardless of whether the condition is true or false.

do {
// code to be executed
} while (condition);


var x = 0;
do {
print('Value of x: $x');
} while (x < 3);

4. For-in Loop:
The for-in loop in Dart is used to iterate over the elements of an iterable (such as lists, sets, or maps). It simplifies the process of iterating through collections by abstracting away the details of indexing. The syntax of a for-in loop in Dart looks like this:

for (var item in iterable) {
// code to be executed

Here, item represents the current element being iterated over, and iterable is the collection being traversed.


var myList = [1, 2, 3, 4, 5];
for (var number in myList) {
print('Number: $number');


In conclusion, Loops are fundamental constructs in Dart programming, allowing developers to automate repetitive tasks and iterate through data efficiently. By mastering the various types of loops and loop control statements, you gain greater control over the flow of your Dart applications. Whether you’re building web applications, mobile apps, or server-side software, a solid understanding of loops is indispensable for writing clean, concise, and maintainable code. So, dive into the world of loops in Dart and unlock the full potential of your programming skills!

Related Question

A loop in Dart is a control flow structure that allows a certain block of code to be executed repeatedly based on a condition.

A for loop in Dart executes a block of code a specified number of times, iterating over a sequence of values defined by an initializer, condition, and increment expression.

You should use a for loop when you know the number of iterations in advance, while a while loop is suitable when the number of iterations is not known beforehand.

In Dart, you can use the break statement to exit a loop prematurely based on a certain condition.

In Dart, you specify a value to be compared against multiple cases. When a match is found, the corresponding block of code is executed. Optionally, a default case can be used to handle values that don’t match any of the specified cases.


OOPS in Dart Object-Oriented Programming

Queue in Dart Programming A

Maps in Dart A Map

Set in Dart A Set

Dart Lists A Dart list

Strings in Dart A Dart

Functions in Dart In Dart,

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