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Sometimes, we may need to execute the same block of code multiple times. Generally, statements are executed in order: the first statement in a function is executed first, followed by the second statement, and so on.
Programming languages provide various control structures for more complex execution paths.
Loop statements allow us to execute a statement or a group of statements multiple times. Below is a flowchart of loop statements in most programming languages:
Scala provides the following types of loops. Click the link to view the details of each type.
| Loop Types | Description |
|---|---|
| while Loop | Execute a series of statements, and if the condition is true, it will repeat until the condition becomes false. |
| do...while Loop | Similar to the while statement, the difference is that the code block of the loop is executed once before the loop condition is checked. |
| for Loop | Used to repeat a series of statements until a specific condition is met, usually achieved by increasing the counter's value after each loop completion. |
Loop control statements change the execution order of your code, allowing you to implement code jumps. Scala has the following loop control statements:
Scala does not support break or continue statements, but from 2.8 Version introduced a way to break out of loops, click the following link to view details.
| Control Statements | Description |
|---|---|
| break Statement | Break the Loop |
If the condition is always true, the loop will become an infinite loop. We can implement an infinite loop using the while statement:
object Test {
def main(args: Array[String]) {
var a = 10;
// Infinite Loop
while(true){
println("The value of a is ": + a);
}
}
}After executing the above code, the loop will continue indefinitely. You can use Ctrl + Press the C key to break out of an infinite loop.