C code to Generate Pascal triangle using 1 D array using user input

C code to Generate Pascal triangle using 1 D array using user input

In this tutorial, we will discuss the concept of the C code to generate a pascal triangle using 1 D arrays with user input

In this topic, we are going to learn how  to write a program to print Pascal triangle patterns using a single  dim array in the C programming language

Here, we  use for, while, and do-while loops for printing pascal triangle

Display the pascal triangle in Java using loops

C Code to display pascal triangle using for loop

In this program, the user is asked to enter the number of rows and then it will show a pascal triangle number pattern using for loop in the C language

Program 1

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

int main()
{
    int arr[30],arr_Temp[30];
    //declare two one dim arrays
    int i,j,k,l, rowNo;
    //declare variables
printf("Enter the number of rows: ");
scanf("%d",&rowNo);
    arr_Temp[0]=1;
    arr[0]=1;
//initialize array elements
    for(j=0; j<rowNo; j++)
        printf(" ");
    printf(" 1\n");

    for(i=1; i<rowNo; i++){
            for(j=0; j<i; j++)
              printf(" ");

            for(k=1; k<=rowNo; k++){
            arr[k]=arr_Temp[k-1]+arr_Temp[k];
    }
    arr[i]=1;
    for(l=0; l<=i; l++){
        printf("%3d",arr[l]);
        arr_Temp[l]=arr[l];

    }
        printf("\n");

}
getch();
 return 0;
}

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

Enter the number of rows: 4

C Code to display pascal triangle using while loop

In this program, the user is asked to enter the number of rows and then it will show a pascal triangle number pattern using the while loop in the  C language

Program 2

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

int main()
{
    int arr[30],arr_Temp[30];
    //declare two one dim arrays
    int i,j,k,l, num_Row;
    //declare and initialize
printf("Enter the numer of rows: ");
scanf("%d",&num_Row);
    arr_Temp[0]=1;
    arr[0]=1;
//initialize array elements
j=0;
    while(j<num_Row){
        printf(" ");
        j++;
    }
    printf(" 1\n");

    i=1;

    while(i<num_Row){
            j=0;
            while(j<i){
              printf(" ");
              j++;
            }
k=1;
            while(k<=num_Row){
            arr[k]=arr_Temp[k-1]+arr_Temp[k];
            k++;
    }
    arr[i]=1;
    l=0;
    while(l<=i){
        printf("%3d",arr[l]);
        arr_Temp[l]=arr[l];
 l++;
    }
        printf("\n");
i++;
}
getch();
 return 0;
}

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

Enter the number of rows:5

C Code to display pascal triangle using do-while loop

In this program, the user is asked to enter the number of rows and then it will show a pascal triangle number pattern using the do-while loop in the C language

Program 3

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

int main()
{
    int arr[30],arrTemp[30];
    //declare two one dim arrays
    int i,j,k,l, rowNo;
    //declare and initialize
printf("Enter the value for the number of rows:  ");
scanf("%d",&rowNo);
    arrTemp[0]=1;
    arr[0]=1;
//initialize array elements
j=0;
   do{
        printf(" ");
        j++;
    } while(j<rowNo);
    printf(" 1\n");

    i=1;

    do{
            for(j=0; j<i; j++)
              printf(" ");
k=1;
            while(k<=rowNo){
            arr[k]=arrTemp[k-1]+arrTemp[k];
            k++;
    }
    arr[i]=1;
    l=0;
   do{
        printf("%3d",arr[l]);
        arrTemp[l]=arr[l];
 l++;
    } while(l<=i);
        printf("\n");
i++;
}while(i<rowNo);
getch();
 return 0;
}

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

“Enter the value for the number of rows:4

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