What does the following string represent in linux l0909l09eE

What does the following string represent in linux?

(\\+l-)?([0-9]+\\.?[0-9]*l\\.[0-9]+)([eE](\\+l-)?[0-9]+)

a.) regular expression for various numbers including an upper or lower case e

b.) strings that start with +/- and end with ?

c.) regular expression for floating point numbers

d.) none of the above

What is the correct answer?

Solution

a.) regular expression for various numbers including an upper or lower case e

Detail:-according this statement should be true because this contain number like {0-9} and upper or lower case e