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Using the switch statement, write a menu driven program:
To check and display whether a number input by the user is a composite number or not.A number is said to be composite, if it has one or more than one factors excluding 1 and the number itself.Example: 4, 6, 8, 9...
To find the smallest digit of an integer that is input:Sample input: 6524Sample output: Smallest digit is 2
For an incorrect choice, an appropriate error message should be displayed.
Programming Example
Using the switch statement, write a menu driven program:
- To check and display whether a number input by the user is a composite number or not.
A number is said to be composite, if it has one or more than one factors excluding 1 and the number itself.
Example: 4, 6, 8, 9...
- To find the smallest digit of an integer that is input:
Sample input: 6524
Sample output: Smallest digit is 2
For an incorrect choice, an appropriate error message should be displayed.
Study this program carefully to understand the logic, output, and explanation in a structured way.
import java.util.Scanner;
public class RAnsariNumber
{
public static void main(String args[]) {
Scanner in = new Scanner(System.in);
System.out.println("Type 1 for Composite Number");
System.out.println("Type 2 for Smallest Digit");
System.out.print("Enter your choice: ");
int ch = in.nextInt();
switch (ch) {
case 1:
System.out.print("Enter Number: ");
int n = in.nextInt();
int c = 0;
for (int i = 1; i <= n; i++) {
if (n % i == 0)
c++;
}
if (c > 2)
System.out.println("Composite Number");
else
System.out.println("Not a Composite Number");
break;
case 2:
System.out.print("Enter Number: ");
int num = in.nextInt();
int s = 10;
while (num != 0) {
int d = num % 10;
if (d < s)
s = d;
num /= 10;
}
System.out.println("Smallest digit is " + s);
break;
default:
System.out.println("Wrong choice");
}
}
}
Type 1 for Composite Number
Type 2 for Smallest Digit
Enter your choice: 1
Enter Number: 9
Composite Number
Press any key to continue . . .
Type 1 for Composite Number
Type 2 for Smallest Digit
Enter your choice: 2
Enter Number: 6524
Smallest digit is 2
Press any key to continue . . .