C Program To Print Day of Week using If else case in switch case

c program     

  C Program To Print Day of Week using  switch case

Example :-

#include<stdio.h>
#include<conio.h>
void main()
{
int num;
clrscr();
printf("enter a number between 1 to 7 :-");
num=getchar ()-'0';
if (num>=1&& num<=7)
{
switch(num)
{
case 1:
printf("monday \n");
break;
case 2:
printf("tuesday \n");
break;
case 3:
printf("wednesday \n");
break;
case 4:
printf("Thursday \n");
break;
case 5:
printf("Friday \n");
break;
case 6:
printf("Saturday \n");
break;
case 7:
printf("Sunday \n");
break;}
}
else{
printf("enter number between 1 to 7");
}
getch();

}

C Program To Print Day of Week using  switch case

Explain Program

Step :1

#include <stdio.h>

 input-output use printf() & scanf() function.

Step :2

int main()

 point of the C program. All execution .

Step :4

int num;

• Declares an integer variable num.

• It will store the number the user enters.

Step :5

printf("enter a number between 1 to 7 :-");

• Displays message to the user to input a number between 1 and 7.

Step :6

num = getchar() - '0';

• getchar() reads one character from the keyboard (like '1', '2', etc.).

• Subtracting '0' converts the character to an integer.

Step :7

if (num >= 1 && num <= 7)

• Checks whether the entered number is between 1 and 7.

• If true, enter the switch block.

• If false, go to the else block and print an error message.

Step :8

switch(num)

• A multi-way branch statement.

• Based on the value of num, it goes to the correct case.

Step :9

case 1: printf("monday \n"); break;

case 2: printf("tuesday \n"); break;

case 3: printf("wednesday \n"); break;

case 4: printf("Thursday \n"); break;

case 5: printf("Friday \n"); break;

case 6: printf("Saturday \n"); break;

case 7: printf("Sunday \n"); break;

Step :10

else

• Runs if the user enters something not between 1 and 7.

• Displays the message: "enter number between 1 to 7".

Output :-

Enter a number between 1 ro 7 :-  5
Friday 

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c program to check number is even or odd use if else

                          c program

c program to check number is even or odd

Examples :-

// even or odd program if else

//if else statement statement only allows

// program to execute one block of code if a check condition

// is true than execute the block or condition is false than exite the block

// of code.

#include<stdio.h>

int main()

{

int number= 0;

printf("enter a number");

scanf("%d",&number);

if(number %2 ==0 )

{

printf("%d is even");

}

else

{

printf("%d is odd");

}

return 0;

}

 c program to check number is even or odd use if else

Explain Program

Step :1

#include <stdio.h>

 input-output use printf() & scanf() function.

Step :2

int main()

 point of the C program. All execution .

Step :3

• printf("enter a number");

• Prints a prompt for the user. You could add a newline ("\n") for cleanliness.

Step :4

• scanf("%d", &number);

• Reads an integer from the user and stores it in number. The & gives the variable’s memory address.

Step :5

if (number % 2 == 0) {

    printf("%d is even");

} else {

    printf("%d is odd");

}

Step :6

• If (number % 2) == 0, there's no remainder, so it's even.

• Otherwise, it's odd.

Step :7

if (number & 1)   // true if odd (LSB is 1)

else              // even (LSB is 0)

Step :8

printf("%d is even\n", number);

Add a newline to output for readability

 c program to check number is even or odd use if else

Output 

enter a number  
7 is Odd

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C Program to Check Number is prime or Not prime

                                      C Program 

 C Program to Check Number is prime or Not prime

Examples :-

#include<stdio.h>

#include<conio.h>

void main()

{

int a, i, flag=0;

printf("enter a positive integer");

scanf("%d", &a);

if(a==0||a==1)

flag=1;

for(i=2;i<=a/2;i++)

{

if(a%i==0)

{

flag =1;

break;

}

}

if (flag==0)

printf("%d is prime number ", a);

else

printf("%d is not prime number",a);

getch();

return 0;

}

C Program to Check Number is prime or Not prime

Explain Program

Step :1

#include <stdio.h>

 Standard Input Output library, which is required for functions like printf() and scanf().

Step :2

void main()

This is the main function, where program execution starts.

Step :3

int a, i, flag = 0;

 stores the number  a, b entered by the user.

Step :4

printf ("enter a positive integer");

scanf ("%d", &a);

 user to enter a number.

 scanf () reads the input and stores it in variable a.

Step :5

if (a == 0 || a == 1)

    flag=1;

0 and 1 are not prime numbers by definition.

Step :6

for (i = 2; i <= a / 2; i++)

{

    if (a % i == 0)

    {

        flag = 1;

        break;

    }

}

loop check if any number between 2 and a/2 divides a completely

Step :7

if (flag == 0)

    printf("%d is prime number ", a);

else

    printf("%d is not prime number", a);

If no divisor was found (flag is still 0), the number is prime.

Output 

 enter a positive integer 133
   133 is not prime number

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C Program to Add Two Integers number

                                        C Program 

1] C Program to Add Two Integers number 

Examples :-

#include<stdio.h>
#include<conio.h>
int  main()
{
int  V, W, sum =0 ;
printf("Enter Two number integer:");
scanf( "%d%d", &V, &W );
sum=V+W;
printf( "sum %d",sum );
getch();
return 0;
}

C Program to Add Two Integers number

Explain Program

Step :1

#include <stdio.h>

 input-output use printf() & scanf() function.

Step :2

int main()

 point of the C program. All execution .

Step :4

1. int V, W, sum = 0;

1. Declares three integers: V, W, and initializes sum to 0.

Step :5

• printf("Enter Two number integer:");
• Prompts the user.

Step :6

scanf("%d%d", &V, &W);

 two integers from keyboard input and stores them in V and W. %d matches integers and & passes the variable's address so scanf can store values there 

Step :7

sum = V + W;
Adds the twos values and assigns the result to sum

Step :8

printf("sum %d", sum);

Displays the sum. Typically, you'd write printf("sum = %d", sum); to improve readability

Step :9

• return 0;
• completed successfully.

1] C Program to Add Two Integers number 

Output 

 Enter Two number integer :

    5
    5
  Sum =10

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               What is the C language

1]    full form  c stands for computer programming  language .

  2] C language  developed and father by Dennis Ritchie at the  Bell Laboratories in 1972 .

  3] C is widely use programming language they are important for the c is low level programming       efficiency simplicity and flexibly, portability influence, system and application software embedded  system, large ecosystem, interfacing with hardware is programming language .

 4] C Is a general-purpose programming language.

 5] C is middle level programming language.

  6] Used c language developing computer software, system programming, application, games such as windows and complicated programs such oracle database, python, git, interpreter

 7] C is an imperative procedural language supporting structured programming.

 8] C language is a procedural and general-purpose programming language.

 9] C is portable assembly language. designed to ease to implementation of compiler the produce high quality code

 10] C uses t0 blocks to separate pieces of code that performing different tasks that helps easier clean code and easier to understand and easy to find  mistake of program

 11] C allows low level memory access provide simple  and clean structure.

C Program Structure 

#include<stdio.h>

#include<conio.h>

int main()

{

printf(" Hi Friend");

return 0;

}

Explain Program

Step :1

#include <stdio.h>

• compiler to include the contents of the Standard Input Output header file (stdio.h) before actual compilation starts.

Step :2

#include <conio.h>

•  Console Input Output header file.

Step :3

int main() { ... }

•  main() function — this is where execution 
•  Indicates that the function returns an integer to the operating system.

•  returning 0 means the program executed successfully.

Step :4

printf(" Hi Friend");

• Displays to the text Hi Friend on the output screen

• message with a space 

Step :5

return 0;

•  Signals that the program completed successfully.

C Program Structure 

Output :- 

Hi Friend

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