Changes between Version 56 and Version 57 of ControlSystems/SoftwareTeam/IntroToPython

Timestamp:

Sep 4, 2017, 7:45:57 PM (8 years ago)

Author:

cdelgigante

Comment:

--

ControlSystems/SoftwareTeam/IntroToPython

@@ -207 +207 @@
  * `sum(iterable)`:  Sums all the numbers in the list ''iterable''.
  * `<string>.isdigit()`:   Strings and some other variable types like lists have some special functions just for them, called methods.  This one returns true of all of the digits in the string are numbers, others are [[https://docs.python.org/3/library/stdtypes.html#string-methods|here]].   '123' would return ''True'', "Cat" would return ''False''. Handy for validation.  You call them *on* the variable itself, and it has to have a value before you can call these methods.
+ * 'int(string)':  Converts an string to a number (so you can do things like math on it).
 
 Here's some examples of how they're used (don't forget to look at earlier lessons for range() and print().
@@ -227 +228 @@
 f = e.isdigit()
 print(f) #Result is True
+
+g = int("123")
+print(g) #Result is 123
+
 }}}
 
 Try running these yourself, making sure the results are as expected.
 
-You can even combine these functions with control structures to do some interesting stuff.  For example, try running this (entering values for x and why when prompted.  Try putting in non-numeric values too): 
+You can even combine these functions with control structures to do some interesting stuff, and even nest them.  For example, try running this (entering values for x and why when prompted.  Try putting in non-numeric or decimal values too): 
 
 {{{
@@ -241 +246 @@
 while not y.isdigit():
    y=input("Enter y-->")
-z = pow(x,y)
+z = pow(int(x),int(y))
 if z > 100:
   print("That's-a big number!")