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09 ITERATIVE CONSTRUCTS
IN JAVA
Learning Objectives
9.1 Loop 9.4 Categories of Loop
9.3 Different Forms of Loops
Many a time, we need to make the computer work in a specific way to complete a task. For example, if we need to
check whether a number is a prime number or not, we need to repeat some steps again and again.
For example, if we want to check whether 7 is a prime number or not. We have to find how many times 7 is
divisible by numbers from 2 to 7. If it is divided only 2 times, i.e., 1 and 7 only, then we can say it is a prime
number. So, we need a statement that will be repeated to check divisibility. This is done by using loops.
9.1 LOOP
A loop is a programming construct that repeats a set of statements until a certain condition is met. A loop
can be repeated any number of times, it depends on the programmed code. The process of execution of the
loop is known as iteration.
9.1.1 Different Parts of a Loop
Let's learn about various parts of a loop.
Parts of a Loop Definition
Loop is a programming construct which
runs repeatedly based on a condition. The
Condition Increment Body of statements are executed until the condition
or
Initialisation for Testing Decrement the Loop is false.
Initialisation
In this part, a variable is initialised that helps the loop to execute. In this example, the variable will be initialised
as int i = 1;
Iterative Constructs in Java 193

