Question

Here is another math-like definition. Assume that x represents a single character and that X represents a string of characters. The operator ""+"" means concatenation.

rev( """" ) = """"
rev( x+X ) = rev(X) + x
What is rev( ""fooey"" )?

Answer 1

To find rev("fooey"), split the string into individual characters and reverse the order.

Step-by-step explanation:

The given definition states that rev(x+X) = rev(X) + x, where rev represents the reverse of a string. To find rev("fooey"), we can apply the definition by splitting the string into individual characters and reversing the order of the characters.

rev("fooey") = rev("f" + "ooey") = rev("ooey") + "f" = "yeoo" + "f" = "yeoof"

Therefore, rev("fooey") = "yeoof"