While loop _do_while Loop _switch

Swith Syntax:

Switch (value)

{

Case value 1:

Statement

Break

Case Value 2:

Statement

Break

Case Value 3:

Statement

Break

Default

Break

}

1, the value matches the case value, matches on the execution corresponding statement, does not match on executes the default

2. Note Colon and semicolon

3, pay attention to the use of break

While syntax:

Initial

while (loop condition)

{

Loop body

State change

}

1, easy to forget the state change

2, while nesting easy to forget the initial conditions

Do_while Syntax:

Initial

Do

{

Loop body

State change

}while (cyclic conditions);

1, regardless of whether the cycle conditions are satisfied to perform the cycle of the body

2, plus semicolon

3. Do not forget the state change and initial conditions

While loop _do_while Loop _switch