MODULE-2

Module 2 repository

C Programming Practice Programs – Series, Patterns, Functions, and Loops

This repository contains 5 C programs demonstrating fundamental concepts such as loops, functions, pattern printing, and basic number operations. Each program includes its Aim, Algorithm, and placeholders for Source Code and Sample Output.

---

C Programming Practice Programs – Loops, Patterns, and Functions

This repository contains 5 C programs demonstrating concepts such as loops, pattern printing, functions, and basic number operations. Each program includes Aim and Algorithm.

---

Programs Included

1. Print 1 to n Odd Numbers
2. Hollow Square Pattern using For Loop
3. Factorial of a Number using Function (Without Return Type, With Arguments)
4. Check Palindrome using For Loop
5. Multiplication Table using Do-While Loop

---

1. Print 1 to n Odd Numbers

Aim: Print all odd numbers from 1 to a user-provided number n.

Algorithm:

1. Ask the user to input a number n.
2. Loop from 1 to n.
3. Check if the current number is odd (num % 2 != 0).
4. Print the odd numbers.

source code

#include<stdio.h>
int main()
{
    int num,i;
    scanf("%d",&num);
    for(i=1;i<=num;i +=2){
        printf("%d ",i);
    }
    return 0;
}

output

Result:
The program displays all odd numbers from 1 up to the entered number n.

---

2. Hollow Square Pattern using For Loop

Aim: Print a hollow square pattern of size n using for loops.

Algorithm:

1. Ask the user to input the size n of the square.
2. Loop through rows (1 to n) and columns (1 to n).
3. Print * for the borders (first row, last row, first column, last column).
4. Print space for inner positions.

source code

#include<stdio.h>
int main()
{
    int num,i,j;
    scanf("%d",&num);
    for(i=1;i<=num;i++){
        for(j=1;j<=num;j++){
            if(i==num||i==1||j==1||j==num){
                printf("#");
            }
            else
                printf(" ");
                    }
            printf("\n")
                    }
    return 0;
}

output

Result:
The program successfully prints a hollow square pattern of stars (*) with the given size.

---

3. Factorial of a Number using Function (Without Return Type, With Arguments)

Aim: Find the factorial of a given number using a function without return type but with arguments.

Algorithm:

1. Ask the user to input a number n.
2. Create a function factorial(int n) that calculates the factorial.
3. Use a loop inside the function to compute factorial.
4. Print the factorial from within the function.

source code

#include<stdio.h>
void fact(int num)
{
    int fact=1,i;
    for(i=1;i<=num;i++)
    {
        fact=fact*i;
    }
    printf("Factorial value is: %d",fact);
    
}
int main()
{
    int n;
    scanf("%d",&n);
    fact(n);
    return 0;
}

output

Result:
The program computes and displays the factorial of the entered number using a function with arguments and no return type.

---

4. Check Palindrome using For Loop

Aim: Check if the input entered by the user is a palindrome.

Algorithm:

1. Ask the user to input a number.
2. Store the input in a variable.
3. Use a for loop to compare the characters/digits from start and end.
4. If all characters/digits match, it is a palindrome; else it is not.

source code

#include<stdio.h>
int main()
{
    int num,rem;
    int original;
    int reversed=0;
    scanf("%d",&num);
    original = num;
    for(;num!=0;num /= 10){
        rem=num%10;
        reversed = reversed*10+rem;
        
  }
    if(original==reversed){
        printf("Palindrome Number");
    }
        else
    {
        printf("Not a Palindrome Number");
    }
    return 0;

output

Result:
The program determines and displays whether the given number is a palindrome.

---

5. Multiplication Table using Do-While Loop

Aim: Print the multiplication table of a user-provided number using a do-while loop.

Algorithm:

1. Ask the user to input a number n.
2. Initialize a counter i = 1.
3. Use a do-while loop to multiply n by i and print the result.
4. Increment i until it reaches 10.

source code

#include <stdio.h>

int main()
{
 int num,i=1;
 scanf("%d", &num);
 do {
     printf("%d ",num*i);
     i++;
    }
    while(i<=num);
    
     
 return 0;

}

output

Result:
The program prints the complete multiplication table of the user-entered number from 1 to 10 using a do-while loop.