C Exercises: Display the pattern in which the first and a last number of each row will be 1
C For Loop: Exercise-36 with Solution
Write a C program to display a such a pattern for n rows using a number that starts with 1 and each row will have a 1 as the first and last number.
The pattern is as follows:
1 121 12321
Visual Presentation:

Sample Solution:
C Code:
#include <stdio.h> // Include the standard input/output header file.
int main()
{
int i, j, n; // Declare variables for loop counters and the number of rows.
printf("Input number of rows : "); // Prompt the user to input the number of rows.
scanf("%d", &n); // Read the input from the user.
for(i = 0; i <= n; i++) // Loop to generate each row of the pattern.
{
/* Print blank spaces */
for(j = 1; j <= n - i; j++) // Loop to print spaces before the numbers.
printf(" ");
/* Display numbers in ascending order up to the middle */
for(j = 1; j <= i; j++) // Loop to print numbers in ascending order.
printf("%d", j);
/* Display numbers in reverse order after the middle */
for(j = i - 1; j >= 1; j--) // Loop to print numbers in descending order.
printf("%d", j);
printf("\n"); // Move to the next line after printing a row.
}
return 0; // Indicate that the program has executed successfully.
}
Sample Output:
Input number of rows : 5 1 121 12321 1234321 123454321
Flowchart:

C Programming Code Editor:
Previous: Write a program in C to display the first n terms of Fibonacci series.
Next: Write a program in C to display the number in reverse order.
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