Page 178 - CA_Blue( J )_Class10
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19. What is an infinite loop? Using a while loop, give an example.
Ans. A loop that executes a set of instructions endlessly due to wrong logic in test condition is called an infinite loop. Example:
int i;
i=2;
while(i>=1)
{
System.out.println(i);
i++;
}
20. Define null loop.
Ans. If code is missing in the body of the loop, then it is known as a null loop.
Example:
int i=5;
while(i>=1)
{
}
21. Write a program to input any 10 numbers (including positive and negative).
Perform the following tasks:
(a) Sum of the positive and negative numbers
(b) Count the number of odd numbers and even numbers
Ans. import java.util.*;
class iterative1
{
public static void main()
{
Scanner sc = new Scanner(System.in);
int pos_sum = 0, odd_c = 0, neg_sum = 0, even_c = 0,n,i;
System.out.println("Enter 10 numbers");
for (i = 1; i <= 10; i++)
{ n = sc.nextInt();
if (n >= 0)
{ pos_sum += n; }
else
{ neg_sum += n; }
if(n%2==0)
{ even_c++; }
else
{ odd_c++; }
}
System.out.println("Positive Sum = " + pos_sum);
System.out.println("Negative Sum = " + neg_sum);
System.out.println("Even Count = " + even_c);
System.out.println("Odd Count = " + odd_c);
}
}
22. Write a program to enter "n" numbers and check whether they are divisible by 4 or not. If divisible then perform the following
tasks:
(a) Display all the numbers ending with the digit 4. (b) Count those numbers ending with 8.
Ans. import java.util.*;
class iterative2
{
public static void main() {
Scanner sc = new Scanner(System.in);
int n,no, c = 0,i;
System.out.println("Enter a number : ");
n=sc.nextInt();
for (i = 1; i <= n; i++)
{
176176 Touchpad Computer Applications-X

