Answer / sudha

#include<stdio.h>
#include<conio.h>
void main()
{
int isprime=1;
int n,i;
printf("enter a number");
scanf("%d",&n);
if(i=2;i<=n/2;i++)
{
if((n%i)==0)
{
isprime=0;
break;
}
}
if(isprime==1)
{
printf("%d is a prime number",n);
}
else
{
printf("%d is not a prime number",n);
}
getch();
}

Answer / sivavendra

Hey sudha,
plz checkout the above code once again.....

if(i=2;i<=n/2;i++) --- What this code indicates?

Answer / naman patidar

we can reduce no of iterations by changing the condition
(i<=n/2) with (i<=sqrt(n))..
This is a rule that if a number is not dividable by any no
(except 1)less than equal to the sqr root of it then the no
is prime.

int n ; // any no, user input.
int i ;
for(i=2; i<=sqrt(n); i++ )
{
if(n%i==0)
{
printf("not prime");
break;
}
}
if(i > sqrt(n)) // you can use a flag as well here
{
printf("prime no");
}

Answer / md.ershad ezaz

#include<stdio.h>
#include<conio.h>
void main()
{
int i,n,c;
clrscr();
printf("Enter a number\n");
scanf("%d",&n);
c=0;
for(i=1;i<=n;i++)
{
if(n%i==0)
c=c+1;
}
if(c==2)
printf("%d is prime",n);
else
printf("%d is not prime",n);
getch();
}

Answer / nikhilreddy gujjula

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

Answer / padhmavathi loganathan

#include<stdio.h>
int main()
{
int a,i,f;
printf("Enter a number: ");
scanf("%d",&a);
f=0;
i=2;
while(i <= a/2)
{
if(a%i == 0)
{
f=1;
break;
}
i++;
}
if(f==0)
printf("Prime Number")
else
printf("Not Prime Number");
return 0;
}

WRITE A PROGRAM TO FIND A REVERSE OF TWO NO

7 Answers  

what is out put of the following code? #include class Base { Base() { cout<<"constructor base"; } ~Base() { cout<<"destructor base"; } } class Derived:public Base { Derived() { cout<<"constructor derived"; } ~Derived() { cout<<"destructor derived"; } } void main() { Base *var=new Derived(); delete var; }

3 Answers   Honeywell,

main() { printf("hello"); fork(); }

0 Answers   Wilco,

Describe static function with its usage?

0 Answers  

1) There is a singing competition for children going to be conducted at a local club. Parents have been asked to arrive at least an hour before and register their children’s names with the Program Manager. Whenever a participant registers, the Program Manager has to position the name of the person in a list in alphabet order. Write a program to help the Program Manager do this by placing the name in the right place each time the Program Manger enters a name. 2) the Event Manager has to send participants to the stage to perform in the order in which they registered. Write a program that will help the Event Manager know who to call to the stage to perform. The Logic should be in Data Structures

0 Answers   KPIT,

What is variable declaration and definition in c?

0 Answers  

Explain how are portions of a program disabled in demo versions?

0 Answers  

write a program to add two numbers of any size.....(remember any size)

1 Answers  

Can we initialize extern variable in c?

0 Answers  

i want to job in your company, so how it will be possible.

3 Answers   TCS,

Program will then find the largest of three numbers using nested if-else statements. User is prompted to enter three numbers. Program will find the largest number and display it on the screen. All three numbers entered by the user are also displayed. If user enters 21, 33, and 5, the output should be as follows: You entered: 21, 33 and 5. The largest number is 33.

0 Answers  

what is dangling pointer?

1 Answers   LG Soft,