Perl - More Loops and Conditionals

Exercises, examples and other material relating to training module P206. This topic is presented on public courses Perl Programming, Perl bootcamp

Learning to program in Perl / Perl Programming - training course - Programming Perl - for newcomers to the language

Learning to program in Perl / Perl Programming - Programming Perl - for newcomers to the language This course introduces you to the Perl programming language. ...

http://www.wellho.net/course/ppfull.html [course]

Learning to Program in Perl / Perl Programming - training course - Learning Perl - whether you're new to programming or 'converting'.

Learning to Program in Perl / Perl Programming - Learning Perl - whether you're new to programming or 'converting'. This course covers programming in the ...

http://www.wellho.net/course/lpfull.html [course]

Breaking a loop - Ruby and other languages

When you're in a loop there are occasions you want to say get me our of this loop NOW, or "I'm done with the current iteration. And those are the 'classic' ...

http://www.wellho.net/mouth/962_Brea ... uages.html [short article]

Question Mark - Colon operator (Perl and PHP)

The ? and : operator in Perl and PHP allows you to write a single statement that's both an if and an else without the need for all the clutter of keywords, ...

http://www.wellho.net/mouth/1825_Que ... -PHP-.html [short article]

Perl Bootcamp - training course - The fundamentals of the language.

Perl Bootcamp - The fundamentals of the language. This course covers the fundamentals of the Perl programming for computer professionals who are new to ...

http://www.wellho.net/course/bpfull.html [course]

The ternary operator in Python

The ? : operator that you may have come across in Perl, PHP, C and Java - known as the ternary or conditional operator - is ABSENT from Python. "But it's ...

http://www.wellho.net/mouth/657_The- ... ython.html [short article]

for loop - how it works (Perl, PHP, Java, C, etc)

When writing a program, you'll often want to repeat a block of code, counting up through a table or performing a block of code with an input value (loop ...

http://www.wellho.net/mouth/1220_for ... -etc-.html [short article]

"There's more than one way of doing it," says the cover of Programming Perl, the book co-written by Larry Wall, who wrote the language. He's right Ð there are usually many ways of doing the same thing. That's confusing for the newcomer, but great for the experienced practitioner. This module covers extra syntaxes for "if" and "while", and other loops and conditionals that use different keywords, or no keywords at all.

This topic is presented on public courses Perl Programming, Perl bootcamp

Tips and short articles on this subject

Are you learning Perl? Some more examples for you!
A pint of Black Rat, and a lazy barman
Setting a safety net or fallback value in Perl
switch and case, or given and when in Perl
For loop - checked once, or evety time? Ruby v Perl comparison and contrast
Question Mark - Colon operator (Perl and PHP)
Saying NOT in Perl, PHP, Python, Lua ...
Ruby, C, Java and more - getting out of loops
for loop - how it works (Perl, PHP, Java, C, etc)
Smart English Output - via PHP and Perl ? : operator
Breaking a loop - Ruby and other languages
The ternary operator in Python
What - no switch or case statement?
Perl - redo and last without a loop

Examples from our training material

andor	and, or, &&, \|\| - precendence
bip	Different conditionals and comparisons
dice	Sample answer - rolling a die
dowhile	a while loop that runs at least once
dunt	A do ... until loop - reprompt until you get valid input.
forloop	Good and bad examples of a for loop
given_demo	given (Perl 5.10 onwards)
golf	Knockout competition - how many teams / players needed?
jump2	Using a label in Perl to jump out of nested loops
jumps	demonstration of next, last and redo
jumps2	Using a label in Perl to jump out of nested loops
lazyops	Lazy and and && operators
mls	Knock out Competition - how many teams?
power	inverted until loop example
qc	while loop, rewritten as for loop
qc2	use of triadic operator
safety_net	The // defined or operator
swit	Use of label to mimic a switch
tae	Checking user input
tel2	unless, and if and unless written in reverse
tel3	Conditional operators "and" and "or"
tel4	Usin the ? : operator instead of if and else
telegram	if and else example
throwz	Sample answer - throwing a die

Pictures

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Background information

This module is available under an Open Training Notes License for free download from http://www.training-notes.co.uk.

Topics covered in this module

The variety that is Perl.
More conditional statements.
If -- single statement rather than a block.
Unless -- an inverted if statement.
Conditional operators.
The ? : operator.
More loop statements.
The until loop.
Single statement while and until loops.
The for loop.
The do - while loop.
Breaking a loop.
Labels.
The goto statement.
Summary.

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