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31 lines
448 B
Bash
31 lines
448 B
Bash
#!/bin/bash
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# testing string length
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#-n 判断长度是否非零
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#-z 判断长度是否为零
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val1=testing
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val2=''
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if [ -n "$val1" ]
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then
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echo "The string $val1 is not empty"
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else
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echo "The string $val1 is empty"
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fi
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if [ -z "$val2" ]
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then
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echo "The string $val2 is empty"
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else
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echo "The string $val2 is not empty"
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fi
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if [ -z "$val3" ]
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then
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echo "The string $val3 is empty"
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else
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echo "The string $val3 is not empty"
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fi
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