Replace using regular expression? [duplicate]

Question

I have a layer with column "ADDL_INFO" having values like
BM 12.4
BM 140!5
BM 320.6
BM 22!5

I want to change '!' mark with '.'

How to change it in qgis 3.5?

Answer 1

Use this code in the field calculator

replace("ADDL_INFO", '!', '.')

However, your question was answered already here:
How to use the replace string function in Field Calculator?