Computer Applications
How many times will the following loop execute? Write the output of the code:
int a = 5;
while (a > 0) {
System.out.println(a-- + 2);
if (a % 3 == 0)
break;
}
Java Iterative Stmts
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Answer
Loop executes two times.
Output
7
6
Reason — Let's go through the Java program step by step to understand how it works:
Initial Value:
a = 5
Iteration 1:
System.out.println(a-- + 2);a--: Post-decrement is used, so the current value ofa(5) is used first, then decremented.- Output:
5 + 2 = 7 abecomes4
if (a % 3 == 0):4 % 3 = 1→ Condition is false, so the loop continues.
Iteration 2:
System.out.println(a-- + 2);a--: Current value ofa(4) is used, then decremented.- Output:
4 + 2 = 6 abecomes3.
if (a % 3 == 0):3 % 3 = 0→ Condition is true, so thebreakstatement exits the loop.
Therefore, the loop executes 2 times and the output is:
7
6
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Related Questions
Define a class to accept a four digit number and check whether it is a Framul Number or not. A number is called a Framul Number if the product of all its digits equals fives times the sum of its first and last digit.
Example 1:
Input: 1325
Product of all digits = 1 x 3 x 2 x 5 = 30
Five times sum of first & last digit = 5 x (5 + 1) = 5 x 6 = 30Output: Framul Number
Example 2:
Input: 2981
Product of all digits = 2 x 9 x 8 x 1 = 144
Five times sum of first & last digit = 5 x (1 + 2) = 5 x 3 = 15Output: Not a Framul Number
If the entered number is not of four digits, the message "Please enter a four digit number" should be shown.
import java.util.Scanner; public class KboatFramulNumber { public static void main(String args[]) { Scanner sc = _____(1)_____ System.out.print("Enter a four-digit number: "); int num = _____(2)_____ _______(3)_______ { System.out.println("Please enter a four-digit number"); return; } int d = 0; int f = num % 10; int p = 1; _______(4)_______ { _____(5)_____ _____(6)_____ _____(7)_____ } int s = _____(8)_____ if (p == s) { _______(9)_______ } else { _______(10)_______ } } }Define a class to accept a number from user and check if it is an EvenPal number or not.
(The number is said to be EvenPal number when number is palindrome number (a number is palindrome if it is equal to its reverse) and sum of its digits is an even number.)
Example: 121 – is a palindrome number
Sum of the digits – 1+2+1 = 4 which is an even numberTo execute a loop 10 times, which of the following is correct?
- for (int i=11;i<=30;i+=2)
- for (int i=11;i<=30;i+=3)
- for (int i=11;i<20;i++)
- for (int i=11;i<=21;i++)
How many times will the following loop execute?
int a = 5; while (a > 0) { System.out.println(a-- + 2); if (a % 2 == 0) break; }