Text MeshPro Input field insert integer?

I have a TextMeshPro Input field added to my scene. I set it’s preferences so that you can only insert integer values. Now I want to change the text of the field to an integer that is stored in PlayerPrefs. The problem is that I can only insert strings. Can someone help me?
Pls send the entire code, I’m pretty new to coding…

You can cast you integer to string by ToString

        yourInputfield.text = yourInteger.ToString();