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expr

List of commands for expr:

- expr
expr:tldr:0561c expr: Calculate a specific mathematic expression.

$ expr ${expression1} ${select} ${expression2}

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- expr
expr:tldr:1f2c3 expr: Get the length of a specific string.

$ expr length "${string}"

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- expr
expr:tldr:2704a expr: Get the first expression if its value is non-zero and not null otherwise get the second one.

$ expr ${expression1} \| ${expression2}

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- expr
expr:tldr:30178 expr: Get the first char position from a specific set in a string.

$ expr index "${string}" "${chars}"

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- expr
expr:tldr:327a4 expr: Get the substring of a string with a specific length.

$ expr substr "${string}" ${from} ${length}

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- expr
expr:tldr:668e2 expr: Get the first expression if both expressions are non-zero and not null otherwise get zero.

$ expr ${expression1} \& ${expression2}

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- expr
expr:tldr:b34dc expr: Match a specific substring against an anchored pattern.

$ expr match "${string}" '${pattern}'

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