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.
Average Rating