how to print all prime number between intervals in c ?

#include<stdio.h>

int main() {

    int low, high, flag;

    int i;

    //take inputs

    printf("enter intervals: ");

    scanf("%d%d", &low, &high);

    // start loop for starting value to ending value

    while(low<high){

        // update value of flag

        flag = 0;

        // ignore value which less the 2

        if(low < 2){

            ++low;

            continue;

        }

        // logic for check prime number

        for(i = 2; i<= low/2; ++i){

            if(low % i == 0){

                flag = 1;

                break;

            }

        }

        if( flag == 0){

            printf("%d\n", low);

        }

        // increment the values

        ++low;

    }

}

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