Java Programming Practical 3
Question 1
Write a program to check multiple conditions using if statement along with logical operators.
LogicalDemo.java
Java
import java.util.*;
public class LogicalDemo
{
public static void main(String a[])
{
int i;
i=1;
do
{
if(i==5||i==10)
System.out.println(i);
i++;
}
while(i<=20);
}
}
Output
Question 2
Write a program to check no is even or odd.
Evenodd.java
Java
import java.util.*;
public class Evenodd
{
public static void main(String a[])
{
int num;
Scanner sc = new Scanner(System.in);
System.out.println("Enter the number");
num = sc.nextInt();
if (num % 2 == 0)
{
System.out.println("Number is even");
}
else
{
System.out.println("Number is odd");
}
}
}
Output
Question 3
Write a program to check switch-case using character datatype.
SwitchDemo.java
Java
import java.util.*;
public class SwitchDemo
{
public static void main(String a[])
{
char ch;
Scanner sc = new Scanner(System.in);
System.out.println("Enter a character between a to f");
ch = sc.nextLine().charAt(0);
switch(ch)
{
case 'a':
System.out.println("You have entered a");
break;
case 'b':
System.out.println("You have entered b");
break;
case 'c':
System.out.println("You have entered c");
break;
case 'd':
System.out.println("You have entered d");
break;
case 'e':
System.out.println("You have entered e");
break;
case 'f':
System.out.println("You have entered f");
break;
default:
System.out.println("Invalid character");
}
}
}
Output
Question 4
Write a program to display 1 to 20 numbers using for, while and do-while loop.
LoopDemo.java
Java
import java.util.*;
public class LoopDemo
{
public static void main(String a[])
{
int i;
System.out.println("1 to 20 numbers using for loop:");
for(i=1;i<=20;i++)
System.out.println(i);
System.out.println("1 to 20 numbers using while loop:");
i=1;
while(i<=20)
{
System.out.println(i);
i++;
}
System.out.println("1 to 20 numbers using do while loop:");
i=1;
do
{
System.out.println(i);
i++;
}
while(i<=20);
}
}
Output
