Java: Display Pascal's triangle

Java Conditional Statement: Exercise-22 with Solution

Write a Java program to display Pascal's triangle.

Construction of Pascal's Triangle:

As shown in Pascal's triangle, each element is equal to the sum of the two numbers immediately above it.

Pascal Triangle using Java language

Test Data
Input number of rows: 5

Sample Solution:

Java Code:

import java.util.Scanner;
public class Exercise22 {

  public static void main(String[] args)
    int no_row,c=1,blk,i,j;
    System.out.print("Input number of rows: ");
    Scanner in = new Scanner(System.in);
		    no_row = in.nextInt();
        System.out.print(" ");
            if (j==0||i==0)
            System.out.print(" "+c);

Sample Output:

Input number of rows: 5                                                                                       
     1 1                                                                                                      
    1 2 1                                                                                                     
   1 3 3 1                                                                                                    
  1 4 6 4 1


Flowchart: Java Conditional Statement Exercises - Display  Pascal's triangle

Java Code Editor:

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Java: Tips of the Day


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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