How to generate a random int in C?

Question

Is there a function to generate a random int number in C? Or will I have to use a third party library?

Answer 1

C Program to generate random number between 9 and 50

#include 
#include 

int main()
{
    srand(time(NULL));
    int lowerLimit = 10, upperLimit = 50;
    int r =  lowerLimit + rand() % (upperLimit - lowerLimit);
    printf("%d", r);
}

In general we can generate a random number between lowerLimit and upperLimit-1

i.e lowerLimit is inclusive or say r ∈ [ lowerLimit, upperLimit )