Java: Summary - Control Flow

Each control statement is one logical statement, which often encloses a block of statements in curly braces {}.

The if else statement can be used in following ways:

a) if ..else

b) if .. elseif .. else

c) if .. elseif .. elsif .. elsif .. else

The switch statement can be used in following ways

a) switch (expression)

b) case a:

c) case b:

d) defualt:

In the following example code we will show you how to use the if statements.

Another example of switch statement also shows how to use the switch statements correctly.

Indenting is essential. Four spaces is most common.

//----- if statement with a true clause
   if (expression) {
       statements // do these if expression is true
   }
   
//----- if statement with true and false clause
   if (expression) {
       statements // do these if expression is true
   } else {
       statements // do these if expression is false
   }
   
//----- if statements with many parallel tests
   if (expression1) {
       statements // do these if expression1 is true
   } else if (expression2) {
       statements // do these if expression2 is true
   } else if (expression3) {
       statements // do these if expression3 is true
   . . .
   } else {
       statements // do these no expression was true
   }
   

   switch (expr) {
      case c1:
            stateme