Access to the set of variables: echo, variable setting rules, unset

Others 2019-12-07 09:45:30 views: null

1. variable access echo

Echo variable $ 

echo $ {variable}

2. The rules set variables

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Origin www.cnblogs.com/sggggr/p/12000542.html

Access to the set of variables: echo, variable setting rules, unset

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