题解 | #挑7#
挑7
https://www.nowcoder.com/practice/ba241b85371c409ea01ac0aa1a8d957b
const readline = require('readline'); const rl = readline.createInterface({ input: process.stdin, output: process.stdout }); rl.on('line', function (line) { // 1、将输入的值保存未数值类型 const num = line * 1 let sum = 0 // 2、循环判断是否符合要求 for(let i = 1; i <= num; i++){ // 是7的倍数或者包含7的 if(i % 7 === 0 || (i+'').includes('7')) sum++ } console.log(sum) });