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.

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();
for(i=0;i<no_row;i++)
{
for(blk=1;blk<=no_row-i;blk++)
System.out.print(" ");
for(j=0;j<=i;j++)
{
if (j==0||i==0)
c=1;
else
c=c*(i-j+1)/j;
System.out.print(" "+c);
}
System.out.print("\n");
}
}
}
Sample Output:
Input number of rows: 5 1 1 1 1 2 1 1 3 3 1 1 4 6 4 1
Flowchart:

Java Code Editor:
Contribute your code and comments through Disqus.
Previous: Write a program in Java to display the pattern like a diamond.
Next: Write a java program to generate a following *'s triangle.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
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
- Weekly Trends
- Python Interview Questions and Answers: Comprehensive Guide
- Scala Exercises, Practice, Solution
- Kotlin Exercises practice with solution
- MongoDB Exercises, Practice, Solution
- SQL Exercises, Practice, Solution - JOINS
- Java Basic Programming Exercises
- SQL Subqueries
- Adventureworks Database Exercises
- C# Sharp Basic Exercises
- SQL COUNT() with distinct
- JavaScript String Exercises
- JavaScript HTML Form Validation
- Java Collection Exercises
- SQL COUNT() function
- SQL Inner Join
We are closing our Disqus commenting system for some maintenanace issues. You may write to us at reach[at]yahoo[dot]com or visit us at Facebook