C programs Example’s

C program to print 0-100 numbers

#include <stdio.h>

int main()
{
    int n,i;
    printf("enter the count");
    scanf("%d",&n);
    for (i=0;i<=n;i++)
    {
    
        printf("%d",i);
    }
    
}

Output

enter the count 20

0123456789111121314151617181920

C program to check even or odd

#include <stdio.h>

int main()
{
    int n;
    printf("enter number to  check even or odd");
    scanf("%d",&n);
    if(n%2==0)
    {
        printf("number is even");
    }
    else
    {
        printf("number is odd");
    }
    
}

output

enter number to check even or odd 5

number is odd

C program to check prime or not

#include<stdio.h>
int main()
{
int i,n,prime=0;
printf("enter the number");
scanf("%d",&n);
for(i=2;i<n;i++)
{
if(n%i==0)
{
prime=1;
break;
}
}
if(prime==0)
{
printf("Number is prime");
}
else
{
printf("Number is not prime");
}
return 0;
}

Output

enter the number 43

number is prime

Write a program to calculate the Factorial.
Factorial
Example

#include<stdio.h>
int main()
{
int i,n,f=1;
printf("enter the number");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
f=f*i;
}
printf("Factorial of number is=%d",f);
}

Output
enter the number 5
Factorial of number is=120
 
3. Write a program to check whether the given number is palindrome or not.

Example

#include<stdio.h>
int main()
{
int r,n,p=0,temp;
printf("enter the number");
scanf("%d",&n);
temp=n;
while(n!=0)
{
r=n%10;
p=p*10+r;
n=n/10;
}
if(p==temp)
{
printf("Number is palindrome");
}
else
{
printf("Number is not palindrome");
}
return 0;
}

Output
enter the number 111
number is palindrome
 
4. Write a program to check whether the number is Armstrong or not.
Armstrong Number
Example

#include<stdio.h>
int main()
{
int n,r,p=0,temp;
printf("enter the number ");
scanf("%d",&n);
temp=n;
while(n>0)
{
r=n%10;
p=p+(r*r*r);
n=n/10;
}
if(temp==p)
{
printf("Number is Armstrong");
}
else
{
printf("Number is not Armstrong");
}
return 0;
}

Output
enter the number 153
Number is Armstrong
 
5. Write a program to display the Fibonacci Series.
Fibonacci Series
Example

#include<stdio.h> 
int main() 
{ int i=0,j=1,k,p,n; 
printf("Enter the number of elements:");
 scanf("%d",&n);
 printf("\n%d %d",i,j);
 for(p=2;p<n;++p)//loop starts from 2 because 0 and 1 are already printed
 { k=i+j;
 printf(" %d",k); 
i=j; j=k; 
} 
return 0; 
} 

Output
Enter the number of elements:12
0 1 1 2 3 5 8 13 21 34 55 89

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