反转字符串

1.
const readline = require(“readline”);
var rl = readline.createInterface({
input:process.stdin,
output:process.stdout,
});
var str = “”;
rl.on(“line”,(line) =>{
str = line;
});
rl.on(“close”,()=>{
console.log(str.split(‘’).reverse().join(“”));
})

2.
const readline = require(“readline”);
const rl = readline.createInterface({
input:process.stdin,
output:process.stdout,
})
rl.on(“line”,(line)=>{
console.log(line.split(‘’).reverse().join(“”))
});

3.
const readline = require(“readline”);
const rl = readline.createInterface({
input:process.stdin,
output:process.stdout,
});
rl.on(“line”,(line)=>{
const tokens = line.split(“”);
var result = “”;
for(var i = tokens.length -1;i>=0;i—){
result += tokens[i];
}
console.log(result);
});

4.
var str = readline();
var strArr = str.split(“”);
strArr = strArr.reverse();
var line = strArr.join(“”);
//var line = readline().split(‘’).reverse().join(“”)
console.log(line);

5.
function reverseString(string){
return const newarry = Array.from(string).reverse().join(“”)
}
var str = readline();
console.log(reverseString(str))

6.
var str = readline().substr(0,1000);
console.log([…str].reverse().join(“”));