Question

How many arguments does the back() function take?

(a) 0

(b) 1

(c) 2

(d) 3

This question was posed to me in an internship interview.

My doubt is from String Manipulation in chapter Arduino Programming of Arduino

Answer 1

Correct choice is (a) 0

The explanation: The back() function returns a character from the string given as input. It takes in no arguments. It returns the last character that is present in the string. It can be used as “cout<<str.front();” which prints the last character from the variable “str”.