<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <body> <script> // 向下舍入 不进行四舍五入直接去掉小数部分 var a = 3.94; var res = Math.floor(a); console.log(res); </script> </body> </html>
