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Java: Display the pattern like right angle triangle with a number

Java Conditional Statement: Exercise-16 with Solution

Write a Java program to display the pattern like a right angle triangle with a number.

Test Data
Input number of rows : 10

Pictorial Presentation:

Java conditional statement Exercises: Display the pattern like right angle triangle with a number

Sample Solution:

Java Code:

import java.util.Scanner;
public class Exercise16 {

   public static void main(String[] args)

{
   int i,j,n;
   System.out.print("Input number of rows : ");
 Scanner in = new Scanner(System.in);
		    n = in.nextInt();

   for(i=1;i<=n;i++)
   {
	for(j=1;j<=i;j++)
	  System.out.print(j);

    System.out.println("");
    }
}
}

Sample Output:

Input number of rows : 10                                                                                     
1                                                                                                       
12                                                                                                       
123                                                                                                       
1234                                                                                                       
12345                                                                                                       
123456                                                                                                       
1234567                                                                                                       
12345678                                                                                                      
123456789                                                                                                     
12345678910  

Flowchart:

Flowchart: Java Conditional Statement Exercises - Display the pattern like right angle triangle with a number

Java Code Editor:

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Next: Write a program in Java to print such a pattern like right angle triangle with a number which will repeat a number in a row.

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Java: Tips of the Day

IsPowerOfTwo

Checks if a value is positive power of two.

To understand how it works let's assume we made a call IsPowerOfTwo(4).

As value is greater than 0, so right side of the && operator will be evaluated.

The result of (~value + 1) is equal to value itself. ~100 + 001 => 011 + 001 => 100. This is equal to value.

The result of (value & value) is value. 100 & 100 => 100.

This will value the expression to true as value is equal to value.

public static boolean isPowerOfTwo(final int value) {
    return value > 0 && ((value & (~value + 1)) == value);
}

Ref: https://bit.ly/3sA5d4I

 





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