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## floor 

+ [link](./floor "Link to this entry.") 
+ [source](https://github.com/lodash/lodash/blob/4.5.0正式版/lodash.src.js#L13905 "View in source.") 
+ [npm](https://www.npmjs.com/package/lodash.floor "See the npm package.")

```
_.floor(number, [precision=0])
```

根據 `precision` 向下保留 `number`。

### 參數

1.  number (number)

    要向下保留的數

2.  [precision=0] (number)

    精度

### 返回值 (number)

返回向下保留的結果

### 示例

```
_.floor(4.006);
// => 4

_.floor(0.046, 2);
// => 0.04

_.floor(4060, -2);
// => 4000 
```




                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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