题解 | #截取字符串#
截取字符串
https://www.nowcoder.com/practice/a30bbc1a0aca4c27b86dd88868de4a4a
const rl = require("readline").createInterface({ input: process.stdin });
let arr=[]
rl.on("line",line=>{
arr.push(line)
})
rl.on("close",()=>{
let str=arr[0]
let n=Number(arr[1])
console.log(str.substring(0,n))
})
