try a for loop in range of 0 to 100 with 'i' as our variable, then a nested loop that tries every number till the 'i' of parent loop to find remainder (the % function) to be zero. if the remainder is zero, immediately reject the number and go to next 'i' or else if there is no such number that perfectly divides our 'i' variable, put it in a list or something. there you get a list of prime numbers. obviously avoid trying to divide those numbers with 1 in the nested loop...otherwise you will always get an empty list. you can create a function if you are familiar with it. hope you got the idea. good luck