How to copy a field (column) values to paste in another field in the same Attribute table in ArcGis Pro

[HadiK]

I need to copy a field values to another field the same attribute table,

Its not the that I want to joint, I just need to copy the values from a field that I have jointed from an excel file to a new field.

[DanPatterson]

Use the field calculator.  Assuming you have added a field of the appropriate type

python parser

!YourOtherField!

note the ! marks surrounding your other fields name

[HadiK]

Thank you for your response
I have tried like this:

!NewField!=!MyField!

Is that correct?
Cause I got error in terms on Null values!?

[JohannesLindner · Accepted solution]

Just the part after the equals sign.