Control Flow

if / else / fi

if test -e file.txt; then
  echo "File exists"
else
  echo "Missing"
fi

String Comparison

if test "$NAME" === "OpenAI"; then
  echo "Matched"
fi

Number Comparison

if test "$COUNT" -gt 3; then
  echo "Greater than 3"
fi

Loops

For loop

for n in 1 2 3; do
  echo "Loop $n"
done

Nested Loops

for outer in A B; do
  for inner in 1 2; do
    echo "$outer$inner"
  done
done