가장 큰 자리 숫자 남기고 내림
let numArr = [0, 3, 34, 345, '/', 0.3, 0.34, 0.345, ',', 0.03, 0.034, 0.0345, 0.00345] numArr.forEach(e => { let regex = new RegExp(`(? let numArr = [98.57, 98.07, 100.1, 100.01, 7.5, 100, 3, 34, 345, 0.3, 0.34, 0.345, 0.03, 0.034, 0.0345, 0.003, 0.0034, 0.00345] function js(num) { if (num console.log(`${e} => ${js(e)}`))