shweta gupta

 Profile Answers by shweta gupta 

• Jun 25th, 2014

 

Code
#include<iostream>


"prime""prime "

Code
#include<iostream>


"prime""prime "

Rajkumar Yonzan

• Feb 24th, 2017

 

// Wap to display all prime number from 1 to 100. //

#include
#include
void main()
{
int i,j,n;
for(n=1;n<=100;n++)
{
i=0;
for(j=1;j<=n;j++)
{
if(n%j==0)
i++;
}
if(i==2)
printf("
%d",n);
getch();
}
}

jbode

 Profile Answers by jbode Questions by jbode

• Mar 8th, 2017

 

To answer the specific question, "if(p)" is the same thing as "if (p == 1)" or "if (p != 0)". The variable "p" is being used as a flag to indicate whether the current candidate number ("n") is prime or not. Thats being determined by using the modulo operator %. If "a % b == 0", then "a" is evenly divisible by "b". So the program performs "n % div" for all values of "div" from 2 to ... something (that part of the code appears to be missing). If "n % div != 0" for all values of "div", then the number is prime and "p" is set to 1 (true). If "n % div == 0" for any value of "div", then the number is "not" prime and "p" is set to 0 (false).

Code