A few days ago I was answering Comparing two fields and printing result as 1 (if number matches) or 0 (if not) using Python Parser of ArcGIS Field Calculator?

When describing the process required to get the result using the Codeblock I talked about the "Pre-Logic Script Code", but then didn't know what to call the next box in the window, so I just said

and in the bottom section enter e

What is that bottom section actually called, so I can use the right term?

[What do I call the circled field?]

  • Function call box? Guessing...
    – FelixIP
    Commented Mar 13, 2016 at 3:47

2 Answers 2


I've always referred to the bottom box as the "Expression Box". In fact if you look at the help, it is referred to as an "expression". For example:

In the tool dialog box, an expression can be entered directly into the Expression parameter, or interactively built using the Field Calculator.

  • 1
    I just call it the expression too
    – PolyGeo
    Commented Mar 13, 2016 at 6:35

This is simply called "Expression". And you can refer to it by saying

Provide definition in Pre-Logic Script Block and then Use checksum( !Numbers!,!data_all! ) as expression

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