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# INCR

> Increment the integer value of a key by one

If a key does not exist, it is initialized as 0 before performing the operation. An error is returned if the key contains a value of the wrong type or contains a string that can not be represented as integer.

## Arguments

<ParamField body="key" type="str" required>
The key to increment.
</ParamField>

## Response

<ResponseField  type="int" required>
The value at the key after the incrementing.
</ResponseField>

<RequestExample>
```py Example
redis.set("key", 6)

assert redis.incr("key") == 7
```
</RequestExample>