shell script question: { set +x; } 2>/dev/null

Question

I was reading a stackoverflow page: Bash set +x without it being printed

My question is simple as you see:

{ set +x; } 2>/dev/null

On the shell script, what does the { set +x; } mean?

I already have answers about the 2>/dev/null so far.

but I cannot find any explanation about the {set +x;} but set -x.

Answer 1

set -x enable a mode, that prints all executed commands to the terminal.

set +x disables this mode.

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