Question

How many arguments does the at() function take?

(a) 0

(b) 1

(c) 2

(d) 3

The question was asked in final exam.

I would like to ask this question from String Manipulation in division Arduino Programming of Arduino

Answer 1

The correct answer is (b) 1

The best I can explain: The at() function returns a character from the string given as input. It takes 1 argument. It returns the character that is present in the string as specified by the argument. It can be used as “cout<<str.at(1);” which prints the second character from the variable “str”.