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Categories >> Software >> Programming Languages >> C
 
 


 

 
 C interview questions  C Interview Questions (2264)
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 Programming Languages AllOther interview questions  Programming Languages AllOther Interview Questions (648)
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 ?    401 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 ?    105 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
 
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why array index always starts from zero?? TCS 4
print a "hello" word without using printf n puts in c language   4
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main() { int i=1; while (i<=5) { printf("%d",i); if (i>2) goto here; i++; } } fun() { here: printf("PP"); } ME 3
Print the foll in C...eg when n=5 the o/p must b + + + + + + + + + + + + + + + + +   1
char ch=10;printf("%d",ch);what is the output Accenture 14
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Write a program to print this triangle: * ** * **** * ****** * ******** * ********** Don't use printf statements;use two nested loops instead. you will have to use braces around the body of the outer loop if it contains multiple statements. Wipro 6
how to generate the length of a string without using len funtion?   4
 
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