Term
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Definition
Group of statements that exist within a program for the purpose of performing a specific task.
Give you a way of performing a task without needing to know how it is done.
Helps modularise the program |
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Term
| Purpose of four built in python functions |
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Definition
print() - display the value (output)
input() - prompt for an input
len() - measure length of data structure
int() - convert to integer
float() - convert to float
str() - convert to string |
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Term
| Benefit of writing your own functions |
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Definition
- simpler code (readability)
- code reuse
-better testing
- faster development
- easier teamwork (can break up the problem) |
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Term
| 5.Write Python code for a function named "increment" which takes a parameter, adds 1 to it, and returns the result. |
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Definition
def increment(prompt):
while True:
val = input(prompt)
try:
intVal = int(val) +1
print(intVal)
except ValueError:
print ('Invalid input: enter an integer.')
continue
increment('Enter a value:') |
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Term
| Write/Draw examples of pseudocode and a flowchart that involve a function call. |
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Definition
call functionName function
[image] |
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Term
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Definition
| variable created inside a function and it's scope is limited to that function |
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Term
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Definition
Variable created outside a function (main code) which can be accessed from any function
- shouldn't use inside functions as you prob can't reuse, errors are harder to track down and programs harder to understand. Makes the functions dependent with the code |
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Term
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Definition
Define the data that can be passed into the function.
Much better then using global variables in a function. Can reuse with different parameters which then become the local variables |
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Term
| Return statements in functions |
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Definition
Allow us to return data from function. Keeps them independent. Could be a data structure.
return |
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Term
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Definition
| Already exist within the language and used to perform common tasks. Don't need to be imported. |
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Term
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Definition
| Specialised packages of functionality that are always included w the language but need to be imported eg. random, math |
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Term
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Definition
| specialised packages of functionality that are not included w the language and often developed by 3rd party. Need to be downloaded and imported |
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Term
| process of external modules |
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Definition
1. User needs functionality that is not available
2. User writes code to achieve it
3. User generalises and polishes
4. user releases to public |
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Term
| considerations using external modules |
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Definition
- might not be compatible with version you are using
- might not be as well coded, tested or maintained as standard library modules
-could have significant security vulnerabilities |
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Term
| Write Python code that imports the random module and uses the "randint()" function from it. |
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Definition
import random
val = random.randint (1,6)
print (val) #print random integer between 1 and 6 |
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