Question

question 48
are the following four statements equivalent?
number += 1;
number = number + 1;
number++;
++number;
a yes
b no

Explanation:

1. Analyze number += 1: This is a compound assignment operator, which is equivalent to number = number + 1. It adds 1 to the current value of number and updates number with the new value.
2. Analyze number = number + 1: This explicitly takes the current value of number, adds 1 to it, and then assigns the result back to number.
3. Analyze number++: This is the post - increment operator. It first uses the current value of number in an expression (if there was an expression), and then increments number by 1. However, when used as a standalone statement (like here), its effect is to increment number by 1, just like the previous two statements in terms of the final value of number after the statement executes.
4. Analyze ++number: This is the pre - increment operator. It first increments number by 1 and then uses the new value. But when used as a standalone statement, the end result (the value of number after the statement) is that number is incremented by 1, same as the other three statements.

All four statements, when used as standalone statements (not part of a larger expression where the difference between pre - and post - increment matters), have the effect of incrementing the value of the number variable by 1. So they are equivalent in terms of the final value of number after each statement is executed.

Answer:

A. Yes