C exercise: Pascal's triangle pattern using 2D Array

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C exercise: Pascal’s triangle pattern using 2D Array

In this tutorial, we will discuss the title of the C exercise: Pascal’s triangle using a 2D Array

In this post, we are going to learn how to display the pascal triangle pattern using a 2D array in C language using for, while, and do-while loop

Java program to print pascal triangle — Pascal triangle

C program to print pascal triangle

Program to display pascal triangle Using for loop

Program 1

This program allows the user to enter the number of rows, and it will display the pascal triangle number pattern using for loop in C language according to the rows

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int arr[50][50];
    //declare 2D array
    int i=0,j=0,count=0;
    //declare and initialize variables
      printf("Enter the number for rows: ");
      //Ask input from the user
    scanf("%d",&count);
    //Reading input
    for(i=0; i<count; i++){
         for(j=0; j<count-1-i; ++j)
                printf(" ");//print space
         for(j=0; j<=i; ++j){
                if(j==0 || j==i)
                arr[i][j]=1;
         else
            arr[i][j]=arr[i-1][j-1]+arr[i-1][j];
                printf("%d ", arr[i][j]);
         }    //print number
    printf("\n");
//move to new line
         }
         getch();
    return 0;
}

When the above code is executed, it produces the following result

C exercise: Pascal's triangle using 2D Array — Output 1

Program to display pascal triangle Using while loop

Program 2

This program allows the user to enter the number of rows, and it will display the pascal triangle number pattern using a while loop in C language according to the rows

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int arr[50][50];
    //declare 2D array
    int i=0,j=0,count=0;
     //declare and initialize variables
      printf("Enter the number o rows: ");
       //Ask input from the user
    scanf("%d",&count);
    //Reading the input
    i=0;
    while(i<count){//outer while
        j=0;
         while(j<count-1-i){//inner while
                printf(" ");
                //print space
    ++j;
         }
         j=0;
         while(j<=i){
                if(j==0 || j==i)
                arr[i][j]=1;
         else
            arr[i][j]=arr[i-1][j-1]+arr[i-1][j];
                printf("%d ", arr[i][j]);
                ++j;
    }
    printf("\n");
    i++;

         }
         getch();
    return 0;
}

When the above code is executed, it produces the following result

Program to display pascal triangle Using a do-while loop

Program 1

This program allows the user to enter the number of rows, and it will display the pascal triangle number pattern using a do-while loop in C language according to the rows

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int arr[50][50];//declare 2D array
    int i=0,j=0,count=0;
    //declare and initialize variables
      printf("Enter the number o rows: ");
       //Ask input from the user
    scanf("%d",&count);
    //Reading the input
    i=0;
    do{
        j=0;
         do{
                printf(" ");
    ++j;
         }while(j<=count-1-i);
         j=0;
         do{
                if(j==0 || j==i)
                arr[i][j]=1;
         else
            arr[i][j]=arr[i-1][j-1]+arr[i-1][j];
                printf("%d ", arr[i][j]);
                ++j;
    }while(j<=i);
    printf("\n");
    i++;

         }while(i<count);
         getch();
    return 0;
}

When the above code is executed, it produces the following result