Why does find -exec mv {} ./target/ + not work?

Question

I want to know exactly what {} \\; and {} \\+ and | xargs ... do. Please clarify these with explanations.

Below 3 commands run

Answer 1

no, the difference between + and \; should be reversed. + appends the files to the end of the exec command then runs the exec command and \; runs the command for each file.

The problem is find . -type f -iname '*.cpp' -exec mv {} ./test/ \+ should be find . -type f -iname '*.cpp' -exec mv {} ./test/ + no need to escape it or terminate the +

xargs I haven't used in a long time but I think works like +.