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for loop:

A for loop is a repetition control structure that allows you to efficiently write a loop that needs to execute a specific number of times
A for loop is useful when you know how many times a task is to be repeated.
The syntax of a for loop is:

for(initialization; test condition; increment/decrement expression)
{
//Statements
}
class SwitchDemo1
{
public static void main(String args[])
{
for(int i=0;i<10;i++)
{
switch(i)
{
case 0:
case 1:
case 2:
System.out.println("Tapuuu");
break;
case 3:
case 4:
case 5:
System.out.println("Silan Software");
break;
default:
System.out.println("Silan");
}
}
}
}
Output
Tapuuu
Tapuuu
Tapuuu
Silan Software
Silan Software
Silan Software
Silan
Silan
Silan
Silan

Here is the flow of control in a for loop:

Example

class Test
{
public static void main(String args[])
{
for(int x = 10; x < 20; x = x+1)
{
System.out.print("value of x : " + x );
System.out.print("\n");
}
}
}
//Output value of x : 10
value of x : 11
value of x : 12
value of x : 13
value of x : 14
value of x : 15
value of x : 16
value of x : 17
value of x : 18
value of x : 19

// here is another simple example to find the factorial of a number.

import java.util.Scanner;
class Factorial
{
public static void main(String args[])
{
int n, fact=1;
Scanner s =new Scanner(System.in);
System.out.println("enter the number");
n=s.nextInt();
for(int i=1;i<=n; i++)
{
fact=fact*i;
}
System.out.println("the factorial is"+fact);
}
}
//Output enter the number
4
the factorial is24

write a program to create a Fibonacci series

import java.util.Scanner;
class Fibonacci
{
public static void main(String args[])
{
int n,i,a,b,c;
Scanner s =new Scanner();
System.out.println("enter the value of n");
n=s.nextInt();
a=0;
b=1;
System.out.print(a);
System.out.print(b);
for(i=1;i<n-1;i++)
{
c=a+b;
a=b;
b=c;
System.out.print(c);
}
}
}
Output
enter the value of n
6
011235
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