1.1: Program on if statement.
Import java.io.*;
Class If
{
Public static void main(String
s[ ]) throws IOExcepiton
{
InputStreamReader read=new
InputStreamReader(System.in);
DufferedReader in=new
BufferedReader(read);
Int a;
System.out.println(“Enter the
Number”);
a=Integer.parseInt(in.readLine());
if(a>0)
Sytem.out.println(“Number
is Positive”);
}
}
Output is
Enter Number 5
Number is Positive
-
1.2: Program on if – else statement
Import java.io.*;
Class IfElse
{
Public static void main(String
s[ ]) throws IOExcepiton
{
InputStreamReader read=new
InputStreamReader(System.in);
DufferedReader in=new
BufferedReader(read);
Int a;
System.out.println(“Enter the
Number”);
a=Integer.parseInt(in.readLine());
if(a>0)
Sytem.out.println(“Number
is Positive”);
Else
Sytem.out.println(“Number
is Negative”);
}
}
Output is
Enter the Number 7
Number is Positive
Or
Enter the Number
-8
Number is Negative
1.3: Program on Nested – if Statement
Import
java.io.*;
Class
Nested
{
Public
static void main(String s[ ]) throws IOException
{
InputStreamReader read=new
InputStreamReader(System.in);
BufferedReader read=new
InputStreamReader(read);
Int a,b,c;
System.out.println(Enter three
numbers”);
a=integer.parseInt(in.readLine(
));
b=integer.parseInt(in.readLine(
));
c=Integer.parseInt(in.readLine(
));
if(a>b)
{
If(a>b)
{
System.out.println(a+”
is greatest”);
}
Else
// c>a
{
System.out.println(c+”
is greatest”);
}
}
Else // b>a
{
If
(b>c)
{
System.out.println(b+”
is greatest”);
}
Else // c>b
{
System.out.println(c+”
is greatest”);
}
}
}
}
Output is
Enter
three numbers 54 80 45
80 is
greatest
-
1.4. Program on Ladder – if (if else if
) statement
Import
java.io.*;
Class
Ladder
{
Public
static void main(String s[ ]) throws IOException
{
InputStreamReader read=new
InputStreamReader(System.in);
BufferedReader in=new
BufferedReader(read);
Int marks, per;
System.out.println(“Enter the
marks”);
Marks=Integer.parseInt(in.readLine(
));
Per=(marks/500)*100;
If(per>90)
{
System.out.println(“A
Grade”);
}
Elseif(per>80
&& per<=90)
{
System.out.println(“B
grade”);
}
Elseif(per>70
&& per<=80)
{
System.out.println(“C
grade”);
}
Elseif(per>60
&& per<=70)
{
System.out.println(“D
grade”);
}
Else
{
System.out.println(“Fail”);
}
}
}
Output is
Enter
the marks 300
D
grade
-
1.5. Program on switch statement
Import
java.io.*;
Class Switch
{
Public
static void main(String s[ ]) throws IOException
{
inputStreamReader Read= new
Input StreamReader(System.in);
BufferedReader in= new
BufferedReader(read);
Int n;
System.out.println(“Enter the
choice”);
n=integer.parseInt(in.readLine(
));
Switch(n)
{
Case 1:
System.out.println(“it
is Sunday”);
Break;
Case 2:
System.out.println(“It
is Monday”);
Break;
Case3:
System.out.println(“It
is Tuesday”);
Break;
Case4:
System.out.println(“It
is Wednesday”);
Break;
Case5:
System.out.println(“it
is Thursday”);
Break;
Case6:
System.out.println(“It
is Friday”);
Break;
Case7:
System.out.println(“It
is Saturday”);
Break;
Default:
System.out.println(“Wrong
choice “);
}
}
}
Output is
Enter the
choice 4
It is
Wednesday.
-
1.6. Program on for loop
Import
java.io.*;
Class for
{
Public
static void main(String s[ ])
{
For(int i=1;
i<=10;i++)
{
System.out.println(“Number=”+i);
}
}
}
Output is
Number = 1
Number =2
Number =3
Number =4
Number =5
Number =6
Number =7
Number =8
Number =9
Number =10
-
1.7. Program on while loop
Import
java.io.*;
Class while
{
Public
static void main(String s[ ])
{
Int i=!;
While(i<=10)
{
System.out.println(“Number=+i);
i++;
}
}
}
Output is
Number =1
Number =2
Number =3
Number =4
Number =5
Number =6
Number =7
Number =8
Number =9
Number =10
-
1.8. Program on do – while loop
Import
java.io.*;
Class
Dowhile
{
Public
static void main(String s[ ])
{
Int i=1;
Do
{
System.out.println(“Number=”+i);
i
+ +;
}
While(i<=10);
}
}
Output
Number =1
Number =2
Number =3
Number =4
Number =5
Number =6
Number =7
Number =8
Number =9
Number =10
-
1.9. Program on break statement
Import
java.io.*;
Class Break
{
Public
static void main(String s[ ])
{
For(int i=1;
i<=10; i++)
{
If(i= =3)
Break;
System.out.println(“Number=”+i);
}
}
}
Output is
Number =1
Number =2
-
1.10. Program on continue statement
Import
java.io.*;
Class
continue
{
Public
static void main(String s[ ])
{
For(int i=1;
i<=10; i++)
{
If(i= =3)
Continue;
System.out.println(“Number
= “+i);
}
}
}
Output is
Number =1
Number =2
Number =3
Number =4
Number =5
Number =6
Number =7
Number =8
Number =9
Number =10
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