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Categories >> Software >> Programming Languages >> C
 
 


 

 
 C interview questions  C Interview Questions (2266)
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 Programming Languages AllOther interview questions  Programming Languages AllOther Interview Questions (652)
Question
write the program for prime numbers?
 Question Submitted By :: C
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
main()
{
int i,j=2,ch=0;
clrscr();
printf("\nENTER ANY NUMBER");
scanf("%d",&i);
while(j<=i/2)
{
if(i%j==0)
{
printf("%d IS NOT PRIME",i);
ch=1;
break;
}
else
{
j++;
}
}
if(ch==0)
{
printf("%d IS PRIME",i);
}
}
 
Is This Answer Correct ?    1239 Yes 383 No
Akhilesh Singh(m.c.a-iisem Ois
 
Answer
# 2
#include<stdio.h>
main()
{
int i,n,count=0;
printf("enter a no.");
scanf("%d",&n);
for(i=2;i<n;i++)

{
if(n%i==0)
{
count++;
}
}
if(count>1)
{
printf("not prime no.");

}
else
printf("prime");
}
 
Is This Answer Correct ?    344 Yes 155 No
Venkat Reddy
 
 
 
Answer
# 3
This program is to check a given number is prime or not
(or) list the prime numbers in a given no.

For example, the user enter the no is 50. the program is
list the prime numbers in 50.
 
Is This Answer Correct ?    402 Yes 262 No
Vasanth
 
Answer
# 4
try this u can find out all prime number between 2 and any
number entered by user .i write code in c# language but
concept remain same in any language.
using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication23
{
class Program
{
static void Main(string[] args)
{
int i=2, j, rem;
while (i <= 100)
{
for (j = 2; j < i; j++)
{
rem = i % j;
if (rem == 0)
break;
}
if (i == j)
Console.WriteLine(i);
i++;
}
}
}
}
 
Is This Answer Correct ?    250 Yes 136 No
Vinay Tiwari
 
Answer
# 5
// prime no series. //
#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,n;
clrscr();
printf("Enter the no: ");
scanf("%d",&n);
printf("\n");
for(i=1;i<=n;i++)
{
for(j=2;j<=i-1;j++)
{
if(i%j==0)
break;
}
if(j==i)
printf("%d ",j);
}
getch();
}
 
Is This Answer Correct ?    173 Yes 84 No
Priyanka Chauhan
 
Answer
# 6
This is written in PL/SQL: TO check wether given number is prime or not

DECLARE
i number:=&i;
j number:=2;
ch number:=0;
BEGIN
WHILE(j<=i/2) loop

if mod(i,j)=0 then
dbms_output.put_line('not prime');
ch:=1;
exit ;
else
j:=j+1;
end if;
end loop;

if ch=0 then
dbms_output.put_line('prime number');
end if;
end;
 
Is This Answer Correct ?    106 Yes 23 No
Naveen Reddy
 
Answer
# 7
int main()
{
int i,j,n,f=0;
printf("Enter the length\n");
scanf("%d",&n);
for(i=2;i<=n;i++)
{
for(j=2;j<i;j++)
{
if((i%j)==0)
{
f=1;
break;
}
f=0;
}
if(f==0)
printf("%d ",i);
}
}
 
Is This Answer Correct ?    180 Yes 107 No
Sham
 
Answer
# 8
int main()
{
int i,j,n,f=0;
printf("Enter the length\n");
scanf("%d",&n);
for(i=2;i<=n/2;i++)
{
for(j=2;j<i;j++)
{
if((i%j)==0)
{
f=1;
break;
}
f=0;
}
if(f==0)
printf("%d ",i);
}
}
 
Is This Answer Correct ?    139 Yes 81 No
Gnanasekaran
 
Answer
# 9
#include<stdio.h>

int main()
{
int c,i,n;
c=0;
scanf("%d",&a);
for(i=2;i<a;i++)
if (n%i==0)
{
c=1;break;
}
if(c!=1)`("prime");
else printf ("not a prime");
}
 
Is This Answer Correct ?    110 Yes 89 No
Arfu
 
Answer
# 10
#include<stdio.h>
#include<conio.h>
void main()
{
int no,i,count=0;
clrscr();
printf("enter the no");
scanf("%d",&no);
for(i=1;i<=no;i++)
{
if(no%i==0)
{
count=count+1;
}
}
if(count<=2)
{
printf("this is prime no");
}
else
{
printf("this is not prime");
}
getch();
}
 
Is This Answer Correct ?    32 Yes 16 No
Pritam Neogi
 

 
 
 
Other C Interview Questions
 
  Question Asked @ Answers
 
Predict the output or error(s) for the following: 25. main() { printf("%p",main); } ME 3
To find whether a number is even or odd without using any conditional operator?? IBM 11
what is difference between getchar,putchar functions and printf and scanf function? does putchar show output only when input given to it   3
write a program to find the frequency of a number Infosys 4
write a program to find the given number is prime or not Accenture 2
what is the maximum limit of row and column of a matrix in c programming. in linux . NIIT 4
2. What is the function of ceil(X) defined in math.h do? A)It returns the value rounded down to the next lower integer B)it returns the value rounded up to the next higher integer C)the Next Higher Value D)the next lower value Accenture 3
WAP to accept basic salary of an employee? Calculate it HRA=25%,DA=30%,PF=30%&net salary display all contents? Wipro 6
9.how do you write a function that takes a variable number of arguments? What is the prototype of printf () function? 10.How do you access command-line arguments? 11.what does ‘#include<stdio.h>’ mean? 12.what is the difference between #include<> and #include”…”? 13.what are # pragma staments? 14.what is the most appropriate way to write a multi-statement macro? L&T 4
what is meant by the "equivalence of pointers and arrays" in C? Satyam 3
Ca some one please help me with aC code to allow user enter numbers from 1 to 20 without repeating and prnt the sum of those numbers thnx   4
How to avoid structure padding in C? Tech-Mahindra 6
 
For more C Interview Questions Click Here 
 
 
 
 
 


   
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