Loop Statements

• Looping means a set of instructions/functions repeatedly based on condition.
• Java provides two ways...
  
• Entry Controlled loop
• 1.0 for loop
• 1.1 enhanced for loop (Foreach)
• 2. while loop
• Exit Controlled loop
• 3. do..while loop

1.0 for loop:

• A for loop is entry control loop.
• It is allows code to be executed repeatedly based on a given Boolean condition. 
• Syntax :

for (Initialization;Condition;Increment/Decrement)
{
Statements;
}

• Example:

for (int x = 1; x <= 4; x++)
System.out.println(x);

1.1 enhanced for loop (Foreach): 

• Enhanced for loop provides a simpler way.
• It is to iterate through the elements of a collection or array. 
• It works on elements basis not index. 
• It returns element one by one in the defined variable.

• Syntax:

for (type element:Collection)
{
    Statements;
}

• Example:

String names[] = {"Sarthak", "Patel", "Khadalpur"};
for (String x:names)
        {
            System.out.println(x);
        }

2. While loop: 

• A while loop is an entry control loop.
• It is allows code to be executed repeatedly based on a given Boolean condition. 
  
• Syntax :

Initialization;
while (Condition)
{
   Statements;
   Increment/Decrement;
}

• Example:

int x = 1;
while (x <= 4)
        {
            System.out.println(x); 
            x++;
        }

3. Do...While loop: 

• A do..while loop is exit control loop.
• It is allows code to be executed repeatedly based on a given Boolean condition. 
• Syntax:

do
{
   Statements;
   Increment/Decrement;
}while (Condition);

• Example:

int x = 1;
do
        {
            System.out.println(x); 
            x++;
        } while (x <= 4);