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I want to generate a number from 0 to 10 randomly using JavaScript and each number can appear only once. Is there a possibility

samuraijack
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  • What've you tried yourself? – Andrew Li Dec 13 '16 at 12:56
  • When you say you want to generate *a* random number which can only appear once, do you mean to want to generate several? And stop on a repeat? Or have the numbers 0..10 in a random permuation? Or something else? – doctorlove Dec 13 '16 at 12:57
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    Actually numbers in row from 0 to 10 **is** random and does not repeats. – Justinas Dec 13 '16 at 12:58
  • Possible duplicate of [How to randomize (shuffle) a JavaScript array?](http://stackoverflow.com/questions/2450954/how-to-randomize-shuffle-a-javascript-array) – Bathsheba Dec 13 '16 at 12:59

2 Answers2

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This can be a solution :

HTML :

<button onclick="getNumber()">click</button>

JS :

var number = [0,1,2,3,4,5,6,7,8,9,10];

function getNumber() {
    if (0 === number.length) {
        alert('Finish')
    } else {
        var index = Math.floor(Math.random() * number.length);
        alert(number[index]);
        number.splice(index, 1);
    }
}
jean-max
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  • Thanks for the help, perhaps badly expressed but I want to get the effect of generating a random number between 1 and 10 and not to duplicate to display all ten numbers. – samuraijack Dec 14 '16 at 07:11
  • Don't understand, you only want that the script generate a number between 1 and 10. That's all ? – jean-max Dec 14 '16 at 08:08
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let arr = []

// 6 is max length of num taken, change it to your convenience

while (arr.length < 6) {
    Random = Math.floor(Math.random() * 6);

    // console.log(Random);
    
    let indexValue = arr.indexOf(Random);
    console.log(Random, indexValue);

    if (indexValue == -1) {
        arr.push(Random);
    }
}

console.log(arr);

// the code will push numbers between 0 to 5 without repetition
// into an empty array
Bandantonio
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shacz007
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