## INDEX

### Write a c program to generate prime number

Write a program to generate prime number in c language

#include<stdio.h>
int main(){

int num,i,count,min,max;

printf("Enter min range: ");
scanf("%d",&min);

printf("Enter max range: ");
scanf("%d",&max);

num = min;
while(num<=max){

count = 0;
i=2;

while(i<=num/2){
if(num%i==0){
count++;
break;
}
i++;
}

if(count==0 && num!= 1)
printf("%d ",num);

num++;
}

return 0;
}

Sample output:
Enter min range: 50
Enter max range: 100
53 59 61 67 71 73 79 83 89 97

Algorithm:

Definition of prime number:

A natural number greater than one which has not any other divisors except 1 and itself is called prime number. In other word we can say which has only two divisors 1 and number itself. For example: 5

Their divisors are 1 and 5.

Note: 2 is only even prime number.

Logic for prime number in c
We will take a loop and divide number from 2 to number/2. If the number is not divisible by any of the numbers then we will print it as prime number.

Example of prime numbers : 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199 etc.