Write a single C statement that declares an int variable randomGuess, and initia

Question

Write a single C statement that declares an int variable randomGuess, and initializes it with a randomly generated odd number between LOWER_BOUND and UPPER_BOUND (inclusive). Assume that LOWER_BOUND and UPPER_BOUND are odd numbers declared as integer constants, and UPPER_BOUND is the larger value of the two.

The answer is int randomGuess = rand() % ((UPPER_BOUND - LOWERBOUND)/2 + 1)*2 + LOWER_BOUND;

I know this is the answer, but I am having trouble understanding it. For example, if UPPER_BOUND were 7 and LOWER_BOUND were 1, then int randomGuess would be rand() % 8 + 1. Doesn't that mean it just randomly generates a number between 8 and 1, instead of an odd number from 7 to 1? What am I missing here?

Explanation / Answer

int randomGuess = rand() % ((UPPER_BOUND - LOWERBOUND)/2 + 1)*2 + LOWER_BOUND;

Hi Friend, rand()%n :- function generates random number between 1 to n-1

   rand() % 8:
       generates random number : 0 to 7
   rand() % 8 + 1:
       generates random number : 1 to 8

Please let me know if still you have doubt

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