2019-03-01 14:43:49 +08:00
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#!/usr/bin/env bash
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# 开启 debug
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set -x
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2019-10-10 08:56:31 +08:00
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for (( i = 0; i < 3; i ++ )); do
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2019-10-29 18:22:19 +08:00
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printf ${i}
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2019-03-01 14:43:49 +08:00
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done
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# 关闭 debug
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set +x
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# Output:
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# + (( i = 0 ))
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# + (( i < 3 ))
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# + printf 0
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# 0+ (( i++ ))
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# + (( i < 3 ))
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# + printf 1
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# 1+ (( i++ ))
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# + (( i < 3 ))
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# + printf 2
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# 2+ (( i++ ))
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# + (( i < 3 ))
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# + set +x
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2019-10-10 08:56:31 +08:00
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for i in {1..5}; do
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2019-10-29 18:22:19 +08:00
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printf ${i};
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2019-10-10 08:56:31 +08:00
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done
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2019-03-01 14:43:49 +08:00
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printf "\n"
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# Output: 12345
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