how to add an extra character at end of each line in vim

Question

I have the following use case, my file contents look like this

a
b
c

I want a regular expression to do this

a|
b|
c|

Can you recommend a regex in vim?

Answer 1

This will work for basic scripting purposes

 sed 's/$/|/' filename

for vim

:%s/$/|/g

the g is for global, but not needed

Answer 2

Type the following in VIM

:%s/$/|/

This means replace the end of line represented by $ with the string |.