//while正序 let i = 0; while(i<arr.length){ console.log(`Hello,${arr[i]}`); i++; } //while倒序 console.log(`-------------------`); let j = arr.length-1; while(j>=0){ console.log(Hello,${arr[j]}); j--; } //for正序 console.log(-------------------); for(var a in arr){ console.log(Hello,${arr[a]}); } //for倒序 console.log(-------------------); for(var b = arr.length-1;b>=0;b--){ console.log(Hello,${arr[b]}); }
Hello,${arr[j]}
-------------------
Hello,${arr[a]}
Hello,${arr[b]}
Sign in to make a reply
猫儿佳佳
//while正序 let i = 0; while(i<arr.length){ console.log(`Hello,${arr[i]}`); i++; } //while倒序 console.log(`-------------------`); let j = arr.length-1; while(j>=0){ console.log(
Hello,${arr[j]}); j--; } //for正序 console.log(-------------------); for(var a in arr){ console.log(Hello,${arr[a]}); } //for倒序 console.log(-------------------); for(var b = arr.length-1;b>=0;b--){ console.log(Hello,${arr[b]}); }