Print n lines of 3 consecutive numbers starting from 1

Last update on March 18 2025 13:30:30 (UTC/GMT +8 hours)

C Practice Exercise

Write a C program to print 3 numbers on a line, starting with 1 and printing n lines. Accept the number of lines (n, integer) from the user.

Pictorial Presentation:

Sample Solution:

C Code:

#include <stdio.h>
int main() {
    int a, i, j = 1, x = 0;

    // Prompt for user input
    printf("Input number of lines: ");
    scanf("%d", &a);

    // Loop for each line
    for(i = 1; i <= a; i++) {
        // Loop to print numbers
        while(x < 3) {
            printf("%d ", j++);
            x++;
        }
        x = 0; // Reset the counter
        printf("\n");
    }

    return 0;
}

Sample Output:

Input number of lines: 5                                               
1 2 3                                                                  
4 5 6                                                                  
7 8 9                                                                  
10 11 12                                                               
13 14 15

Flowchart:

For more Practice: Solve these Related Problems:

• Write a C program to print n lines of 4 consecutive numbers starting from 1.
• Write a C program to display a grid of numbers with a fixed number of columns, where each line continues the sequence from the previous line.
• Write a C program to print n lines, each containing consecutive numbers in an arithmetic progression with a user-defined common difference.
• Write a C program to print a rectangular pattern of numbers with a specified number of rows and columns, filling the grid sequentially.

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