Re: Generating a unique 4 digit random number
The form below is a random string generator, which can be utilized to generate a series of coupon codes, unique passwords and any other random alphanumeric strings. By entering 'L' for Letters, 'N' for Numbers and 'S' for Symbols, the string generator can create strings that are more than 10 characters in length.
Jun 18, 2018 11:40 PMPaulTheSmithLINK
tonyR6
the 1st method, it will never produce duplication.
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Why not? The first string is generated
The second string is generated - it has one chance in 10,000 of being the same as the first string.
If you modify the first method to use the HashSet method from the second method then you have created a problem. After all 10,000 strings have been generated the method will hang forever. (Not to mention that every call of the code will be slower and slower).
Random Key Generator Music
It sounds like you are trying to shuffle Kaspersky internet security free trial activation code. the numbers from 0 to 9999 and deliver them one at a time (much like shuffling a pack of cards and dealing them one by one). To do that you should generate the list of all 10,000 four digit codes and store them somewhere (a pretty small amount of data). Each code has an index. Start the index at zero. The first request for a PIN gets the item at index zero. Increment the index and remember the value. Each request for a PIN gets given the value at the next index (which is then incremented). If the index increments to 10,000 then reset it to zero.