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C programs QnA

Q. If sum of two integer is 14 and if one of them is 8 then find other integer. Ans: Well, this is very simple. Simply, one integer is 8 and sum of two integers is 14. So, we need to subtract the number 8 from their sum of 14 to get the second number. So, the second number is: 14 - 8 = 6 C-Program of this task Code---> #include<stdio.h> int main () { int num1 = 8 , num2 , sum = 14 ; num2 = sum - num1 ; printf ( "The second number is: %d" , num2 ); return 0 ; }
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Prime number or not ? in C language



In this C-program we will check a number is Prime or not. The number will be taken from the user.

input:

The number(i.e : 5,6,9 etc.)

output:

The number will be Prime or not

CODE---->


#include<stdio.h>
int main() 
{
 int i,n,f=0;
 printf("Please,Enter a positive number: "); 
 scanf("%d",&n); 
 if(n==0||n==1) 
 {
  if(n==0)
   printf("You entered ZERO.\n0 is not a Prime number or not a Composite number.\n");
  else
   printf("You entered ONE.\n1 is not a Prime number or not a Composite number.\n");
 }
 else
 {
  for(i=1;i<=n;i++) 
  {
   if(n%i==0)
    f=f+1;
  }
  if(f==2) 
   printf("%d is a Prime number.\n",n);
  else
   printf("%d is not a Prime number.\n",n);
 }
 return 0;
}

Download the C-Program file of this Program.

Don't just read, run on your pc !!!


RESULT :

Please,Enter a positive number: 89
89 is a Prime number.

--------------------------------
Process exited after 1.869 seconds with return value 0
Press any key to continue . . .


Images for better understanding :

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