# IsNull

### **Description**‌

The IsNull function replaces empty input values with the specified replacement value. If the input value is not empty will the value not be replaced.

### **Syntax**

‌The syntax for the IsNull function is:

`IsNull(input, replacement)`

#### ‌**Parameters**

input - the string which, if it is empty, will be replaced. 

replacement - the value which will replace an empty input.

### **Returns**

‌The IsNull function returns a string. 

### **Example**‌

Let's look at some IsNull function examples and explore how to use the IsNull function.‌

```
IsNull("", 0)
Result: 0
```