Lesson 4	Loop Statements
Objective	Cover important points about the for, while, and do statements

For, while, and Do Loop Statements in Java

for statement

The for statement is used to repeatedly execute a statement or statement block while an index variable (or set of index variables) is updated. The for statement is controlled by a three-part for clause that consists of

initialization statements,
a boolean expression,
and update statements, which can be an increment or decrement of the variable that was initialized.

The three parts are separated by semicolons:
Always make sure you use the correct condition for what you want to achieve with your loop.

You want to count from 0 to (n-1):
```
for( i = 0; i < n ; i++)
```
You want to count from 1 to n:
```
for (i = 1; i <=n ; i++)
```

Java Reference

for(initializationStatements; booleanExpression;update statements)
statementBlock

Multiple initialization or iteration statements are separated by commas. If multiple statements are contained in the initialization part, then all variables that are declared in the initialization statements must be of the same type.

for (initialization;  boolean condition; iterator ) {
/*Nested statement(s) that are repeatedly executed with 
each iteration of the for statement.*/
}

The while statement

The while statement is much simpler than the for statement. It repeatedly executes a statement block until a boolean expression becomes false. If the boolean expression is initially false then the statement block is not executed at all.

while (condition) {
  /*Nested statement(s) that are executed
  while condition is true.*/
}

The do-while statement

The do statement is similar to the while statement but differs in that it executes a statement block first and then evaluates a boolean expression to determine if the block should continue to be executed. This means that the statement block will execute at least once.

do {
/*Nested statement(s)*/
}
while (condition);