Random number gen 1 10

How it works

You ask for an integer in a closed interval. The generator draws one value from the ten integers that begin at 1 and end at 10. Nothing outside that list should appear. Nothing inside that list should be blocked unless you added a rule of your own, such as “already drawn.” Inclusive bounds are the ordinary reading of this query: 1 is legal, 10 is legal, 0 is not, 11 is not, and 7.5 is not unless you switched the tool into decimals, which this search is not asking for.

On a screen this is usually a pseudorandom algorithm. That is enough to pick a classroom group, a game turn, or a chore from ten cards. It is not enough to mint a cryptographic key. If 10 never shows across a long session, the range is probably exclusive at the top, or the display is hiding the last face. Check the bounds before you blame luck.

A random number gen without a stated range is an unfinished request. Ten, one hundred, and “any integer” are different machines. This page is the ten. Write 1–10 on any note you keep so the next person does not replay a different die.

Ten faces, both ends live

Think of a ten-sided die with faces 1 through 10. Each click is one roll. Rolls are independent unless you said otherwise, so 4 can follow 4. A session that “looks clumpy” can still be fair. A session that never shows 10, or that secretly avoids the last result, is not a uniform 1–10 gen. Uniform means each of the ten integers has the same chance on a given draw, not that a short run will look spread out.

In range: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. Out of range: 0, 11, negatives, and fractions in integer mode. Repeat draws: allowed when each click is independent. Unique draws: shuffle the ten values, then take as many as you need.

People type “1 10” with a space, “1-10” with a hyphen, or “1 to 10” with a word. Those are spellings of the same closed interval. They are not ten, nine, or eleven values depending on punctuation. If a programmer’s half-open interval drops the top, that is a different contract. A spinner for humans should not drop 10.

Ten sides is still a die. Calling it a generator does not add an eleventh face, and it does not remove the 10.

When the random number gen is not 1–10

Need 0 through 9? That is another ten, shifted down. Need 1 through 6? That is a cube, not this page. Need several numbers at once? Decide two things: how many, and whether they may repeat. Ten unique values is just a permutation of the whole range. Three unique values is a short shuffle. A stream of twenty rolls will repeat; it has to, because there are only ten faces.

Record the mode next to the result. “1–10 inclusive, one roll” is complete. “We used a random number gen” is not. The missing bounds are how two groups draw different winners and both think the machine cheated. It did not cheat. It was asked two different questions.

If you are using the draw as a percent, stop. A 1–10 integer is not a percentage. A 1–100 integer is the usual stand-in for percent. Mixing those two ranges is how a “1 in 10” chance quietly becomes a “1 in 100” chance in a spreadsheet. Keep the ten and the hundred in separate columns.