For loops are a type of looping construct in Java that allow you to iterate over a sequence of elements, such as an array or a list. They are a powerful tool for repeating a block of code a certain number of times or until a certain condition is met.
Here’s the syntax for a for loop in Java:
for (initialization; condition; increment/decrement) {
// code block to be executed
}
The initialization section is where you initialize a counter variable. The condition is a boolean expression that is evaluated before each iteration of the loop. If the condition is true, the code block inside the loop will be executed. If the condition is false, the loop will terminate. The increment/decrement section is where you update the counter variable.
Here’s an example of a for loop that prints the numbers from 1 to 10:
for (int i = 1; i <= 10; i++) {
System.out.println(i);
}
In this example, the counter variable i is initialized to 1, and the loop will continue until i is greater than 10. The counter variable is incremented by 1 each time the loop iterates.
You can also use a for loop to iterate over an array or a list in Java. Here’s an example of a for loop that prints out all the elements in an array:
int[] numbers = {1, 2, 3, 4, 5};
for (int i = 0; i < numbers.length; i++) {
System.out.println(numbers[i]);
}
In this example, the counter variable i is used as the index to access each element in the array. The loop will continue until i is equal to the length of the array.
I hope this tutorial has helped you understand how to use for loops in Java.