Schedule

Schedule

Wednesday, January 28

1422462600 FLOSS Weekly
1422468000 Tech News Today
1422471600 Windows Weekly
1422478800 This Week in Google
1422489600 Tech News 2Night
1422491400 Android App Arena
1422496800 Ham Nation

Thursday, January 29

1422554400 Tech News Today
1422558000 Know How...
1422561600 Marketing Mavericks
1422567000 Coding 101
1422570600 Home Theater Geeks
1422576000 Tech News 2Night
1422577800 The Giz Wiz

Friday, January 30

1422640800 Tech News Today
1422644400 This Week in Law
1422662400 Tech News 2Night

Saturday, January 31

1422730800 The Tech Guy

Sunday, February 1

1422817200 The Tech Guy
1422831600 This Week in Tech

Monday, February 2

1422900000 Tech News Today
1422903600 Triangulation
1422909000 iPad Today
1422921600 Tech News 2Night

Tuesday, February 3

1422986400 Tech News Today
1422990000 MacBreak Weekly
1422997200 Security Now
1423004400 Before You Buy
1423008000 Tech News 2Night
1423011600 All About Android
1423020600 Padre's Corner

Wednesday, February 4

1423067400 FLOSS Weekly
1423072800 Tech News Today
1423076400 Windows Weekly
1423083600 This Week in Google
1423094400 Tech News 2Night
1423096200 Android App Arena
1423101600 Ham Nation

Thursday, February 5

1423159200 Tech News Today
1423162800 Know How...
1423166400 Marketing Mavericks
1423171800 Coding 101
1423175400 Home Theater Geeks
1423180800 Tech News 2Night
1423182600 The Giz Wiz

Friday, February 6

1423245600 Tech News Today
1423249200 This Week in Law
1423267200 Tech News 2Night

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Security Now

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MacBreak Weekly

Apple earnings report preview.

Tech News Today

Feds nab a Russian spy ring that wanted to destabilize the stock market.

Tech News 2Night
Episode #261: Sling TV Review January 26th, 2015

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Triangulation

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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!
* Follow PadreSJ and Snubs on Twitter.
* Watch the show live and join the chatroom every Thursday at 1:30pm PST.
* Email us at Padre@twit.tv and Shannon@twit.tv.
* Join our Google+ Community!

Download or subscribe to this show at twit.tv/code. Also, check out our transcripts.

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Running time: 43:00