rand() function is used in C to generate random numbers. If we generate a sequence of random number with rand() function, it will create the same sequence again and again every time program runs. Say if we are generating 5 random numbers in C with the help of rand() in a loop, then every time we ... How can I create an array of 20 random bytes in Java? Stack Overflow Public questions and answers; Teams Private questions and answers for your team; Enterprise Private self-hosted questions and answers for your enterprise Can some post a code with simple Unique Random Numbers. Random numbers stored in arr[20] but unique. Well, if the array is only 20 elements long, why not generate a random number for every entry i, and then compare it with all previous numbers arr[0..i-1], if it compares, throw it away and generate a new one?

Can some post a code with simple Unique Random Numbers. Random numbers stored in arr[20] but unique. Well, if the array is only 20 elements long, why not generate a random number for every entry i, and then compare it with all previous numbers arr[0..i-1], if it compares, throw it away and generate a new one? To generate random number on 0 to N-1, the cheap and nasty way is rand() % N. This doesn't give a very good distribution, because rand() isn't truly random and the lower bits are less random than the whole. So the best way to to say Hello friends, Need help in generating a random number from an array.Once a number is generated, the number has to be deleted from the array so that only the remaining numbers can be generated from the array.And it should go on until all the numbers from the array are deleted.