how to use random in c

// C program to generate random numbers 
#include <stdio.h> 
#include <stdlib.h> 
#include<time.h> 
  
// Driver program 
int main(void) 
{ 
    // This program will create different sequence of  
    // random numbers on every program run  
  
    // Use current time as seed for random generator 
    srand(time(0)); 
  
    for(int i = 0; i<4; i++) 
        printf(" %d ", rand()); 
  
    return 0; 
} 

#include <stdio.h>

int main(){
    int i = 0;
    while(i < 50)
    {
        int num;
        num = rand(); //this function generates the random number
        printf("%i\n", num);
        i++;
    }

return 0;
}