Convention of a += operator in pseudo-code

I have to write some algorithm in pseudocode for a paper. For this I have the "$ \leftarrow$ " to assign a value.

$ x \leftarrow y^2$

now I want to write a method which adds to the variable. In normal Python code I would write x += 1 for this. Is there a style convention how to layout this in pseudo-code in a paper? I dont really like the redundance of $ x \leftarrow x+1$ .