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Which symbol is used for finding the length of the string?

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Which symbol is used for finding the length of the string?

(a) .

(b) *

(c) .*

(d) .*.

I got this question in final exam.

The query is from Case and Expr Command topic in section Essential Shell Programming of Unix

1 Answer

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Best answer
The correct option is (c) .*

For explanation: The length of the string can be extracted using .* . This regular expression signifies to expr that it has to display the number of characters matching the pattern i.e. the length of the entire string. For example,

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