Control Flow Statements
Basically, you can control the flow of your Pineapple code with any of the following:
-
if
,elif
andelse
-
for
loop -
while
loop -
break
,continue
orreturn
If-elif-else statements
Similar to Python, all you need is indentation (tab), you don't need those curly brackets. For example:
if he.isCrazy
you.callAmbulance
elif he.isInDanger
you.goHelp(he)
else
you.doNothing
Note that every test expression must be Boolean type.
Remember that .isCrazy
and other similar construct are just functions.
Test expression chaining
Sometimes, a single test expression is not enough to express what you really wanted. In such situation, you can use the following logical operators:
-
and
-
or
-
not
For example:
if he.isYoung and he.isNaughty
"He is a kid".show
elif sky.isBlue or air.isFresh
"I am happy!".show
elif not current.isLunchTime
"Continue working . . .".show
Note
not
operator have higher precedence than or
and and
.
For example, the following code:
if not he.isFine and he.isEating
...
Is same as:
if (not he.isFine) and he.isEating
...
For statements
For statements is used to iterate over a list.
For example:
for x in [1,2,3,4]
x.show
While loop
While loop is use to loop some code until certain condition is met.
while not file.atEOF
file.readline.show