C Program to print the given pattern.

#include <stdio.h>
void main()
{
	int row , i , j;
	
	printf("Enter the number of rows: ");
	scanf("%d" , &row );
	
	for (i = 1 ; i <= row ; ++i )
	{ 
		for ( j = 1 ; j <= i ; ++j)
		{
		printf("* ");
		}
		printf("\n");
	}
	 }

USER OUTPUT :

C Program to check an armstrong number.

 #include <stdio.h>

int main()
{
	int  number , temp , remainder , i , power , digits = 0 , sum = 0 ;
	;
	printf("Enter a number : ");
	scanf("%d" , &number);
	temp = number ;
	while (temp != 0)
	
	{
		digits ++ ;
		temp = temp/10 ;
	}
	temp = number ;
	
	while (number != 0 ){
		remainder = number % 10 ;
		i = 1 ;
		power = 1 ;
		while (i <= digits){
			power = power * remainder ;
			i++ ;
		}
		sum = sum+power ;
		number = number /10;
	}
	if (sum == temp)
	{
		printf("The given number %d is an armstrong number\n" , temp);
		
	}
	else
	{
		printf("The given number %d is not an armstrong number\n" , temp);
	}
	
	return 0 ;
}

Print all the prime number, between 1 to 100 in C.

#include <stdio.h>


int main()
{
	int num1 , num2 , i , c = 0 ;
	printf("Enter range : ");
	scanf("%d %d" , &num1 , &num2);
	printf("Prime numbers in primes.txt file:\n");

while (num1 < num2)
{
	c =0 ;
	if (num1 <= 1)
	{
		++num1;
		continue ;
	}
	for (i = 2 ; i <= num1/2 ; ++i)
	{
		if (num1%i == 0)
		{
			c =1 ;
			break;
		}
	}
	if(c == 0 )
	{
		printf("%d " , num1);
	}
	
	++num1 ;
	
	
}
printf("\n");
return 0 ;
	
}

C program to compute the Sum of the Series 1 + x + x2 + x3 + …………. +xn.

 

#include <stdio.h>
#include <math.h>
int main()
{
	int x , n , sum = 1 , value , i;
	printf("Enter x and n : ");
	scanf("%d %d" , &x , &n);

	
	if(x < 0 ||n < 0)
	{
		printf("Illegal values\n");
	}
		else
		{
			printf("Sum of series : ");
	
		for(i = 1 ; i <= n ; i++)
		{
			value = pow(x , i);
			sum = sum + value ;
		}
	
		
		printf("%d\n" , sum);
		
		}
	

	
	return 0;
}

C program to check whether a given number is Palindrome or not.

#include <stdio.h>
int main()
{
  	int n , r , sum = 0 , temp ; 
	printf("Enter an integer : ");
	scanf("%d" , &n);
	 temp = n ;
	while (n > 0)
	{
		r = n % 10 ;
		sum = (sum * 10)  + r ;
		n = n/10 ;
	}
	printf("The reverse of a given number : %d\n" , sum );
	if (temp == sum )
	{
	printf("%d is a palindrome\n" , temp );
	}
	else
	{
		printf("%d is not a palindrome\n" , temp );
	}
	
	return 0 ;
}

C program to print Floyds Triangle.

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

C program to find the reverse of the given number.

#include <stdio.h>
int main()
{
	int n , reverse = 0 , rem  ;
	printf("Enter an integer : ");
	scanf("%d" , &n);
	while(n != 0)
	{
		rem = n % 10 ;
		reverse = reverse * 10 + rem ;
		n = n/10 ;
		
	}
		printf("The reverse number of a given number = %d", reverse);
	
	
	return 0 ; }