Question

Write a program in java to get an output
aaaa
aaaa
aaaa​

Answer 1

For Loop - Java

The question requires us to understand and use the For Loop in Java.

The for loop is used to execute a specific part of code for a given number of times.

The syntax of the for loop is:

$\texttt{for(Start Condition; End Condition; Increment/Decrement)}\\\{\\\texttt{\qquad Code}\\\}$

The start condition can be anything simple. Like $\texttt{int i = 0}$. After this, we need a semicolon (;) and we mention the end condition. Like $\tt i < 5$. After this we put a semicolon again and mention the increment/decrement operation. For example, $\tt i++$.

Let's see a simple example:

$\rule{100}{1}$

for(int num = 0; num < 5; num++)

{

   System.out.println(num);

}

$\rule{100}{1}$

Output:

0

1

2

3

4

$\rule{100}{1}$

The loop starts with num = 0. The end condition is num < 5. So, the loop will keep running until the value of num becomes greater than or equal to 5.

So, the loop starts with num = 0. It checks if num < 5, which is true (as 0 < 5) and then executes the print statement inside. It prints the value of num to the screen. Then, the num++ part increments value of num by 1.

Now, num = 1. It checks the num < 5 again, which is true, and so prints num to the screen. It goes like this. Now at the end, we have num = 4 printed. The num++ will make num = 5. Now, num < 5 evaluates to false, so the loop terminates.

The loop printed 0 to 4 on the screen.

$\rule{320}{1}$

Analysing the Pattern

We need the output:

$\tt aaaa\\\tt aaaa\\\tt aaaa$

The pattern has three lines. So, we will need a loop to run 3 times. We can accomplish this using a for loop.

On each line, we have the letter "a" printed 4 times. So, inside the loop, we can create another loop which will run 4 times and print "a". So, we are creating a loop inside a loop, which is called a nested loop.

Using this nested loop concept, we can create the required output.

We have an outer loop running 3 times, and an inner loop running 4 times. Here's the Program Code.

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Program Code - SimpleForLoop.java

public class SimpleForLoop

{

   public static void main(String[] args)

   {

       //Create Outer Loop to run 3 times for 3 lines

       for(int i = 0; i < 3; i++)

       {

           //Create Inner Loop to run 4 times for 4 "a"s

           for(int j = 0; j < 4; j++)

           {

               System.out.print("a");  //Print "a"

           }

           //Print new line after each row

           System.out.println();

       }

   }

}

Answer 2

Answer:

hope it helps...........