How to Write for Loops in Java

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In Brief...

The 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.


  1. Open your text editor and type in the following Java statements.
    Java Source For Loop
    Notice that the loop will execute for each element in the array. The length property of the array is the number of elements in the array. At the start of the loop, the variable i is set to 0. After each loop iteration, i is incremented by one.

  2. Save your file as

  3. 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.

    Compile Source for Loop Program

  4. 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.
    Run The for Loop Program

Author: Stephen Withrow

Stephen has over 30 years' experience in training, development, and consulting in a variety of technology areas including Java, C, C++, XML, JavaScript, AJAX, Tomcat, JBoss, Oracle, and DB2. His background includes design and implementation of business solutions on client/server, Web, and enterprise platforms. Stephen is a published writer in both technical and non-technical endeavors. Stephen received an undergraduate degree in Computer Science and Physics from Florida State University.