向下取整而且保留兩位小數

//向下取整 保留兩位小數 var num1 = 123.8976; var result = Math.floor(num1); console.log(result); //123 var result1 = Math.floor(num1*100); console.log(result1); //向後推兩位 12389 var result2 = Math.floor(num1*1

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