How to Write for Loops in Java
for loop in Java executes one or more statements after testing the loop continuation condition at the start of each iteration. At the beginning of the loop, one or more optional statements can be executed. At the end of each iteration an optional statement or statements can be performed. To understand how to code the
for loop, follow these four steps.
- Open your text editor and type in the following Java statements.
Notice that the loop will execute for each element in the array. The
lengthproperty of the array is the number of elements in the array. At the start of the loop, the variable
iis set to 0. After each loop iteration,
iis incremented by one.
- Save your file as WriteforLoops.java.
- Open a command prompt and navigate to the directory containing your Java program. Then type in the command to compile the source and hit Enter.
- You are ready to test your program. Type in the command to run the Java runtime launcher and then hit Enter. Notice each element of the array has been displayed.