Dart – Loops - CodeDixa

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Dart is a programming language used to develop applications for the web, mobile, and desktop. One of the fundamental features of any programming language is the ability to repeat a set of instructions, which is called looping. In Dart, loops are used to execute a block of code multiple times until a specific condition is met. In this article, we will discuss the different types of loops in Dart and how to use them effectively.

For Loop

The for loop is used to repeat a block of code a specific number of times. It has three parts: the initializer, the condition, and the increment/decrement. The syntax for the for loop in Dart is:

for (initializer; condition; increment/decrement) {
  // code block to be executed
}

For example, to print the numbers from 1 to 10, the for loop can be written as:

for (int i = 1; i <= 10; i++) {
  print(i);
}

While Loop

The while loop is used to execute a block of code as long as a given condition is true. The syntax for the while loop in Dart is:

while (condition) {
  // code block to be executed
}

For example, to print the numbers from 1 to 10 using the while loop, the code can be written as:

int i = 1;
while (i <= 10) {
  print(i);
  i++;
}

Do-While Loop

The do-while loop is similar to the while loop, but the code block is executed at least once, even if the condition is false. The syntax for the do-while loop in Dart is:

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

For example, to print the numbers from 1 to 10 using the do-while loop, the code can be written as:

int i = 1;
do {
  print(i);
  i++;
} while (i <= 10);

For-Each Loop

The for-each loop is used to iterate over the elements of a collection, such as a list or map. The syntax for the for-each loop in Dart is:

for (element in collection) {
  // code block to be executed
}

For example, to print the elements of a list, the for-each loop can be written as:

List<int> numbers = [1, 2, 3, 4, 5];
for (int number in numbers) {
  print(number);
}

In conclusion, loops are an essential part of any programming language and Dart provides several types of loops to repeat a set of instructions. Understanding and using loops effectively can make your code more efficient and readable.