How to concatenate 'int' and 'str' type?

Hey, I tried to run this code in VSCode:

a = '5' + 5

And it threw me an error as followed:

Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    a = '5' + 5
TypeError: can only concatenate str (not "int") to str

How can I concatenate these different data types together? Please help!