while vs while true

Question

When you look at how infinite loops should be implemented  you mostly see this approach   while   do     loop infinitely done   But I just don t understand the use of   here  Wouldn t it be better to use   while true do     loop infinitely done

User · Answer

The colon is a built-in command that does nothing  but returns 0  success   Thus  it s shorter  and faster  than calling an actual command to do the same thing

User · Answer

from manual         arguments              No effect  the command does nothing beyond expanding arguments and performing  any  specified             redirections   A zero exit code is returned    As this returns always zero therefore is is similar to be used as true  Check out this answer  What Is the Purpose of the      colon  GNU Bash Builtin

[bash] "while :" vs. "while true"

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