如何在一个维数组中存储3个随机数，然后在Javascript中得到警告

Question

function next_question()
{


for (i = 0; i <= 2 ; i++)
{
    a = Math.floor(Math.random() * (8 - 0)) + 0;
ques_number[i] = a;

}

alert (ques_number[0]);


}

I want to create an Array, that has 3 random numbers in it and then get an alert of which numbers were stored in an Array! It seems simple but I'm doing something basically wrong here that my above code isn't working! Please help thanks

Answer 1

You need

• a global variable ques_number ,
• two local variables i and a ,
• a simplified random part

 var ques_number = []; function next_question() { var i, a; for (i = 0; i <= 2 ; i++) { a = Math.floor(Math.random() * 8); ques_number[i] = a; } alert(ques_number[0]); } next_question(); document.write('<pre>' + JSON.stringify(ques_number, 0, 4) + '</pre>');