Equivalent of Python if __debug__

In Python there is a feature for simple print style debugging to be switched on or off.
If you run a Python script with the -O option then

if __debug__:
      print variable, variable, variable

Is there an equivalent in Julia? I know you could set a constant to be true or false, bt that involves editing the code to switch on/off the debug lines.

See https://docs.julialang.org/en/v1.1/stdlib/Logging/#Environment-variables-1.

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This may interest you too: @assert alternatives?

Thankyou both