✏️ Explanatory Question
What is the value of y after evaluating the expression given below?
y+= ++y + y-- + --y; when int y=8
What is the value of y after evaluating the expression given below?
y+= ++y + y-- + --y; when int y=8
y+= ++y + y-- + --y
⇒ y = y + (++y + y-- + --y)
⇒ y = 8 + (9 + 9 + 7)
⇒ y = 8 + 25
⇒ y = 33
Let's analyze and implement the Java program to evaluate the given expression:
y += ++y + y-- + --y;
Given int y = 8, let's break it down step by step:
++y → Pre-increment: y becomes 9, and 9 is used.y-- → Post-decrement: 9 is used, then y becomes 8.--y → Pre-decrement: y becomes 7, and 7 is used.9 + 9 + 7 = 25y = y + 25 → y = 8 + 25 = 33
public class ExpressionEvaluation {
public static void main(String[] args) {
int y = 8; // Initialize y
y += ++y + y-- + --y; // Evaluate the expression
System.out.println("Value of y: " + y); // Output result
}
}
Output:
Value of y: 33