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SC3006

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Lucas Larson edited this page Sep 28, 2025 · 3 revisions

In POSIX sh, standalone ((..)) is undefined.

Problematic code:

variable=1
if ((variable)); then
  echo variable is not zero
fi

Correct code:

bash supports standalone ((..)) natively.

For POSIX compliance, use

variable=1
if [ "${variable}" != 0 ]; then
  echo variable is not zero
fi
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