bash : add example for case-switch.
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help/linux/bash/script/case.md
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23
help/linux/bash/script/case.md
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# Bash case switch.
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Example:
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```bash
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case EXPRESSION in
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PATTERN_1)
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STATEMENTS
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;;
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PATTERN_2)
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STATEMENTS
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;;
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PATTERN_N)
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STATEMENTS
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;;
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*)
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STATEMENTS
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;;
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esac
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```
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