Arithmetic, Input and Output

Question 1

when does ‘+’ mean concatenation

Answer 1

when at least one of its operands is a String

Question 2

if x = 2.0 and y - 1.2
what is the -xy/xy?

Answer 2

-1.44

Question 3

how to print a double quotation mark

Answer 3

(“"”)

Question 4

how to print a back slash

Answer 4

(“\”)