C Program to Print Half Pyramid of Numbers

Introduction

A half pyramid pattern with numbers is a simple triangular arrangement where the numbers increase in each row. This exercise helps in understanding the use of nested loops and controlling output using numbers in a half-pyramid shape.

Problem Statement

Create a C program that:

• Accepts the number of rows for the pyramid.
• Prints a half-pyramid pattern with numbers.

Example:

• Input: rows = 5
• Output:

  1
  1 2
  1 2 3
  1 2 3 4
  1 2 3 4 5
  

Solution Steps

1. Input the Number of Rows: The user defines the number of rows for the half pyramid.
2. Use Nested Loops: The outer loop handles the rows, and the inner loop handles printing the numbers.
3. Display the Half-Pyramid Pattern: Print numbers in increasing order for each row.

C Program

#include <stdio.h>

int main() {
    int i, j, rows;

    // Step 1: Accept the number of rows for the pyramid
    printf("Enter the number of rows: ");
    scanf("%d", &rows);

    // Step 2: Outer loop for the rows
    for (i = 1; i <= rows; i++) {
        // Step 3: Inner loop to print numbers
        for (j = 1; j <= i; j++) {
            printf("%d ", j);
        }
        // Move to the next line after each row
        printf("\n");
    }

    return 0;
}

Explanation

Step 1: Input Number of Rows

• The program begins by asking the user to input the number of rows for the half pyramid.

Step 2: Outer Loop for Rows

• The outer loop controls how many rows are printed. It runs from 1 to rows.

Step 3: Inner Loop for Numbers

• The inner loop prints the numbers in increasing order, starting from 1 and going up to the current row number (i).

Output Example

For rows = 5, the output will be:

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5

For rows = 4, the output will be:

1
1 2
1 2 3
1 2 3 4

Conclusion

This C program prints a half pyramid pattern using numbers. The program uses nested loops to print increasing numbers in each row, forming a half pyramid shape. This exercise helps in practicing loop control and formatting output in C programming.