C Exercises: Insert a comma between two numbers, no comma after the last character

Last update on September 19 2025 12:45:12 (UTC/GMT +8 hours)

Print sequence from 1 to nnn separated by commas

Write a C program to print a sequence from 1 to a given (integer) number, inserting a comma between these numbers. There will be no comma after the last character.

Sample Solution:

C Code:

#include <stdio.h>

int main () {
    int n, i;

    // Prompt user for input
    printf("\nInput a number(integer):\n");

    // Read an integer value 'n' from user
    scanf("%d", &n);

    // Check if 'n' is positive
    if (n > 0) {

        printf("Sequence:\n");

        // Loop to print numbers from 1 to 'n-1'
        for (i = 1; i < n; i++) {
            printf("%d,", i); // Print each number followed by a comma
        }

        printf("%d\n", i); // Print the last number without a comma
    }
}

Sample Output:

Input a number(integer):
25
Sequence:
1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25

Flowchart:

C Programming Flowchart: Insert a comma between two numbers, no comma after the last character.

For more Practice: Solve these Related Problems:

Write a C program to print numbers from 1 to n with commas between them, ensuring no trailing comma using loops.
Write a C program to generate a comma-separated sequence using pointer arithmetic and string manipulation.
Write a C program to print the sequence from 1 to n using recursion and concatenating commas appropriately.
Write a C program to build the sequence in an array and then output it as a comma-separated string.

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