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- function randomNum() {
- var num=parseInt(Math.random()*10000);
- var a1=num%10;
- if(num<10) return [a1];
- var a2=parseInt((num%100)/10);
- if(num<100) return [a2,a1];
- var a3=parseInt((num%1000)/100);
- if(num<1000) return [a3,a2,a1];
- var a4=parseInt(num/1000);
- return [a4,a3,a2,a1];
- }
- console.log(randomNum());
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