Control Statements Programs in C

Write a program to check whether an alphabet is vowel or consonant?

#include <stdio.h>

#include<conio.h>

void main()

{

char ch;

 clrscr();

  printf("Input a character\n");

  scanf("%c", &ch);

 if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' &&ch <= 'Z'))

 {

 If (ch=='a' || ch=='A' || ch=='e' || ch=='E' || ch=='i' || ch=='I' || ch=='o' || ch=='O' || ch== 'u' || ch=='U')

{

 printf("%c is a vowel.\n", ch);

}

   else{

   printf("%c is a consonant.\n", ch);

  }
}

  getch();

}

To check  a number is Odd or Even?

#include <stdio.h>

#include<conio.h>

void main()

{

int n;

 clrscr();

 printf("Enter an number\n");

   scanf("%d", &n);

 if (n%2 == 0){

   printf("Even\n");}

   else{

      printf("Odd\n");}

 getch();

}

To check  whether a year is  leap year or Not?

#include <stdio.h>

#include<conio.h>

void main()

{

clrscr();

  int year;

printf("Enter a year to check if it is a leap year\n");

  scanf("%d", &year);

 if ( year%4 == 0 )

   {

    printf("%d is a leap year.\n", year);

   }

   else

   {

    printf("%d is not a leap year.\n", year); 

 }

getch();

}

Calculate sum of digits of a number?

#include <stdio.h>

#include<conio.h>

void main()

{

  int num, t, sum = 0, remainder;

  clrscr();

   printf("Enter an Number\n");

   scanf("%d" ,&num);

   t = num;

  while (t != 0)

   {

      remainder = t % 10;

      sum = sum + remainder;

      t= t / 10;

   }

  printf("Sum of digits of %d\n", sum);

 getch();

}

Calculate Factorial Number?

#include <stdio.h>

#include<conio.h>

void main()

{

     int n;

   long fact = 1;

  clrscr();

  printf("Enter a number\n");

  scanf("%d", &n);

 while(n>0)

  {

      fact=fact*n;

      n--;

  }

 printf("Factorial of %d\n",fact);

 getch();

}

Swapping of two numbers

#include <stdio.h>

#include<conio.h>

void main()

{

 

  int x, y, temp;

  

  clrscr();

   

 printf("Enter the value of x and y\n");

  scanf("%d%d", &x, &y);

   printf("Before Swapping \nx=%d\n y = %d\n",x,y);

   temp = x;

   x = y;

   y = temp;

   printf("AfterSwapping\nx=%d\n y = %d\n",x,y);

getch();

}

 To find whether a number is Armstrong number or not?

#include <stdio.h>

#include<conio.h>

void  main()

{ 

 int n, sum = 0, t, remainder;

 clrscr();

 printf("\nPlease enter a number ");

  scanf("%d",&n);

  t = n;

  while( t != 0 )  {

      remainder = t%10;

      sum = sum + remainder*remainder*remainder;

      t = t/10;

   }

   if ( n == sum )

      printf("The number is an Armstrong number ");

   else

      printf("The number  is not an Armstrong number");

getch();

}

Find the Largest Number Among Three Numbers

#include <stdio.h>

#include<conio.h>

void main()

{

  int a, b, c;

 clrscr();

 printf("\nPlease enter 3 numbers:");

      scanf("%d%d%d", &a, &b, &c);

      if(a>=b && a>=c)

         printf("\nThe largest number is %d", a);

      else if(b>=a && b>=c)

         printf("\nThe largest number is %d", b);

      else

         printf("\nThe largest number is %d", c);

getch();

}

 Find square and cube of a given number.

 #include <stdio.h>
#include<conio.h>

void main()

{

int n;

 clrscr();

  printf("Enter a number");

    scanf("%d",&n);  

    printf("Square of the number %d is %d",n,n*n);

    printf("Cube of the number %d is %d",n,n*n*n);

getch();

}

 Print "Hello World" without using semi colon

#include <stdio.h>

#include<conio.h>

void main()

{

   clrscr();

   if(printf("Hello World"))

   {

 }

getch();

}

SWAPPING of 2 NUMBERS WITHOUT THIRD VARIABLE

#include <stdio.h>

#include<conio.h>

void main()

{

  int  X, Y;

 clrscr();

   printf("Please enter the 1st number : ");

   scanf("%d",&X);

   printf("\nPlease enter the 2nd number : ");

   scanf("%d",&Y);

   printf("Before swapping:\n");

   printf("X  is %d \n and Y is %d\n", X, Y);

   X = X - Y;

   Y = X + Y;

   X= Y - X;

  printf("After swapping:\n");

   printf("X is %d \n and Y is %d", X, Y);

   getch();

}

To Check Whether a Number is Prime or Not

#include <stdio.h>

#include<conio.h>

void main()

{

int i, num, pm = 0;

clrscr();

   printf("Please enter a number: \n");

   scanf("%d", &num);

   for(i=1; i<=num; i++)

   {

      if(num%i==0)

      {

         pm++;

      }

   }

   if(pm==2)

   {

      printf("Entered number is %d and it is a prime number.",num);

   }

   else

   {

      printf("Entered number is %d and it is not a prime number.",num);

   }

getch();

}

Write a program to find reverse of a number

#include<stdio.h>
#include<conio.h>

void main()

{

   int n, reverse = 0;

 clrscr();

   printf("Enter a number \n");

   scanf("%d",&n);

  while( n != 0 )

   {

      reverse = reverse * 10;

      reverse = reverse + n%10;

      n = n/10;

   }

printf("reverse no is:%d\n",reverse);
getch();
}
To check palindrome no or not?

#include<stdio.h>
#include<conio.h>

void main()

{

   int n, reverse = 0,temp;

 clrscr();

   printf("Enter a number to check if it is a palindrome or not\n");

   scanf("%d",&n);

temp=n;

  while( temp != 0 )

   {

      reverse = reverse * 10;

      reverse = reverse + temp%10;

      temp = temp/10;

   }

 

 if ( n == reverse )

      printf("%d is a palindrome number.\n", n);

   else

      printf("%d is not a palindrome number.\n", n);

getch();

}