Schedule

Schedule

Tuesday, April 28

1430240400 Tech News Today
1430244000 MacBreak Weekly
1430253000 Security Now
1430262000 Tech News 2Night
1430265600 All About Android

Wednesday, April 29

1430321400 FLOSS Weekly
1430326800 Tech News Today
1430330400 Windows Weekly
1430337600 This Week in Google
1430348400 Tech News 2Night
1430350200 Android App Arena
1430355600 Ham Nation

Thursday, April 30

1430413200 Tech News Today
1430416800 Know How...
1430422200 Marketing Mavericks
1430427600 Home Theater Geeks
1430434800 Tech News 2Night
1430436600 The Giz Wiz

Friday, May 1

1430499600 Tech News Today
1430503200 This Week in Law
1430514000 Before You Buy
1430521200 Tech News 2Night

Saturday, May 2

1430589600 The Tech Guy

Sunday, May 3

1430676000 The Tech Guy
1430690400 This Week in Tech

Monday, May 4

1430758800 Tech News Today
1430762400 Triangulation
1430767800 iPad Today
1430775000 Coding 101
1430780400 Tech News 2Night

Tuesday, May 5

1430845200 Tech News Today
1430848800 MacBreak Weekly
1430857800 Security Now
1430866800 Tech News 2Night
1430870400 All About Android

Wednesday, May 6

1430926200 FLOSS Weekly
1430931600 Tech News Today
1430935200 Windows Weekly
1430942400 This Week in Google
1430953200 Tech News 2Night
1430955000 Android App Arena
1430960400 Ham Nation

Thursday, May 7

1431018000 Tech News Today
1431021600 Know How...
1431027000 Marketing Mavericks
1431032400 Home Theater Geeks
1431039600 Tech News 2Night
1431041400 The Giz Wiz

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Coding 101

Internal Iterators, SMART Dynamically typed variables, and HHVM vs. ASP.NET.

Tech News Today

Google announced a new initiative today: The Patent Purchase Promotion.

This Week in Tech

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The Tech Guy
The Tech Guy 1182 April 26th, 2015

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Coding 101 14

Thrown a For Loop

April 24 2014

Hosts: Fr. Robert Ballecer, SJ and Shannon Morse

Guest: Dale Chase

Welcome to Coding 101 - It's the TWiT show that gives YOU the knowledge to live in the wonderful world of the programmer. This week we are introducing our newest module, Python with Code Warrior Dale Chase!

To see all the code used in today's episode, go to Our Github Repository for Module 2

Loops (Recap)

* As we may recall, loops are an easy way to reuse code.
* It allows us to "loop" a section of code so that it doesn't have to be writen over and over.

For Loops
For Loops use a "range" function to determine the start and the end of the loop.

Code Sample:

for counter in range(0,3):

- print counter

* Notice how the counter print statement ran from 0 - 2 and NOT 0 - 3. That's because the counter is incremented at the end of each loop and each loop does a pre-test. After the code prints "2", 1 is added to the counter. When it loops back to the range function, the counter is "3" - Since we told the loop to rune as long as we are "in range" of 0 to 3", it will no longer run. (it's the same as "<" in C#)

if/else statements
* A "if" statement evaluates an relational expression and executes a block of code if that expression is true.

Code Sample:

a = raw_input("Please enter a whole number:")

b = raw_input("Please enter a second whole number:")

if a < b:
print "a is less than b""

* A "if/else" statement evaluates a relational expression and executes a block of code if that expression is true, AND EXECUTES A DIFFERENT BLOCK OF CODE IF THAT EXPRESSION IS FALSE

Code Sample:

a = raw_input("Please enter a whole number:")

b = raw_input("Please enter a second whole number:")

if a < b:

- print "a is less than b"

elif a == b:

- print "a is equal to b"

else:

- print "b is less than a"

The Modulo (Mod) Operator
* It does a division calculator and returns the remainder of that division
* Syntax: "a%b"
* Which means, "Divide a by b, and return the value of the remainder of that division"

Sample Problem
* Find a way to decide if a user-inputed number is odd or even!
* If we wanted to know if a number is odd or even, we would use the Mod operator on a value, dividing it by 2 and checking to see what number is returned as the remainder:

If the number is "0", then we know the number was EVEN because dividing by 2 left no remainder

If the number is "1", then we know that the number was ODD because dividing ANY odd number would leave a remainder of 1.

Sample Code:

var1 = raw_input("Please enter a whole number:")

leftover = int(var1) % 2

if leftover == 0:

- print var1, "is an even number"

else:

- print var1, "is an odd number

"

Get in Touch With Us!

* Subscribe and get Coding 101 automatically at TWiT.tv!
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* Watch the show live and join the chatroom every Thursday at 1:30pm PST.
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Download or subscribe to this show at twit.tv/code. Also, check out our transcripts.

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Running time: 43:00