Question

What is the output of the program segment below?

int var1 = 100;
String var2 = "100";
System.out.println(var1 + var1);
System.out.println(var2 + var2);
(A) 200
200
(B) 100100
100100
(C) 200
100100
(D) Error message

Answer 1

The output is '200' from adding two integers, followed by '100100' from concatenating two string representations of the number 100.

Step-by-step explanation:

The output of the given program segment involves two different operations due to the two different data types used. The first line of code adds two integers, while the second line of code concatenates two strings.

int var1 = 100; // This is an integer variable.
String var2 = "100"; // This is a string variable.
System.out.println(var1 + var1); // This will output the sum of var1 and var1, which is 200.
System.out.println(var2 + var2); // This will concatenate var2 with var2, resulting in "100100".

Therefore, the correct output is:
200
100100