Impara Introduction to Loops

A loop in Dart is a programming construct that allows you to repeatedly execute a code block until a specific condition is met.

Loops are used to automate repetitive tasks, work with data collections, or perform a specific operation a certain number of times. Loops are essential to programming and enable you to efficiently and systematically handle repetitive tasks.

Note

There are several types of loops, each suited for a specific task. In the next chapters, you’ll learn when and how to use each one.

Let's say you have a code fragment that needs to be executed ten times. There are two ways to achieve this:

Copy and paste the code many times;
Use a loop.

Consider an example code to see the first approach to solving the task.

main.dart


              123456789101112
            
void main() {
  print("Programming is interesting");
  print("Programming is interesting");  
  print("Programming is interesting");
  print("Programming is interesting");
  print("Programming is interesting");
  print("Programming is interesting");
  print("Programming is interesting");
  print("Programming is interesting");
  print("Programming is interesting");
  print("Programming is interesting");
}

As you can see, you have completed the task and displayed the text on the screen ten times. But what if the task is to display the text on the screen a thousand times or even a million times? In such cases, you can use a for loop:

main.dart


              12345
            
void main() {
  for(int i = 0; i < 10; i=i+1){
    print("Programming is interesting");
  }
}

As you can see, with just three lines of code, you displayed the information on the screen ten times.

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Sezione 4. Capitolo 1

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A loop in Dart is a programming construct that allows you to repeatedly execute a code block until a specific condition is met.

Note

There are several types of loops, each suited for a specific task. In the next chapters, you’ll learn when and how to use each one.

Let's say you have a code fragment that needs to be executed ten times. There are two ways to achieve this:

Copy and paste the code many times;
Use a loop.

Consider an example code to see the first approach to solving the task.

main.dart


              123456789101112
            
void main() {
  print("Programming is interesting");
  print("Programming is interesting");  
  print("Programming is interesting");
  print("Programming is interesting");
  print("Programming is interesting");
  print("Programming is interesting");
  print("Programming is interesting");
  print("Programming is interesting");
  print("Programming is interesting");
  print("Programming is interesting");
}

main.dart


              12345
            
void main() {
  for(int i = 0; i < 10; i=i+1){
    print("Programming is interesting");
  }
}

As you can see, with just three lines of code, you displayed the information on the screen ten times.

Tutto è chiaro?

Grazie per i tuoi commenti!

Sezione 4. Capitolo 1