Question

Java programs
Using scanner class

10.)Write a program to input an integer and check whether it is a 2-digit or a 3-digit number or not. Incase.
it is not a 2-digit or a 3-digit number, a relevant message ("Not 2 or 3 digit number") should be displayed.​

Answer 1

Explanation:

While input, use string datatype. Calculate that datatype's length using length(); function and display the message according the length

Answer 2

Answer:

class Q10

{

95 Computer Applications – IX (ICSE Course) Answers

static void main()

{

int n;

Scanner sc=new Scanner(System.in);

System.out.println(“Enter an integer:”);

n=sc.nextInt();

if(n>=10 && n<=99 || n>=-99 && n<=-10)

System.out.println(“2-digit number”);

else if(n>=100 && n<=999 || n>=-999 && n<=-100)

System.out.println(“3-digit number”);

else

System.out.println(“Not a 2 or 3-digit number”);

}

}

Explanation: