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Consider the following Java code:
int x = 7896;
System.out.println(x + ‘\b’);
a) What will be the output of this program?
b) Explain why '\b' does not behave like a backspace here and instead changes the output to a different number.
c) How should \b be used in Java to actually demonstrate the backspace effect in console output?
Answer: a) 7904 b) Explanation: In Java, '\b' is a character literal representing the backspace character. Its Unicode (ASCII) value is 8. In the expression x + '\b': x = 7896 (an int) '\b' = 8 (a char promoted to int) So the calculation is: 7896 + 8 = 7904 Hence, the output is 7904. The backspaceRead more
Answer:
a) 7904
b) Explanation:
c) Correct way to demonstrate backspace:
To actually see the backspace effect in console output, \b must be used inside a string:
public class BackspaceDemo {
public static void main(String[] args) {
System.out.println(“7896\b”);
}
}
Here, the \b moves the cursor back by one position, so the 6 gets erased and in this case answer will be 789
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