Informatics2-2020/Lab01

A MathWikiből
(Változatok közti eltérés)
a (Running python)
a (roomtemp)
61. sor: 61. sor:
  
 
== roomtemp ==
 
== roomtemp ==
According to <a href="https://en.wikipedia.org/wiki/Room_temperature">Wikipedia</a>
+
According to [https://en.wikipedia.org/wiki/Room_temperature Wikipedia]
 
a room has a temperature between 18°C and 25°C. Write a function that decides that for us.
 
a room has a temperature between 18°C and 25°C. Write a function that decides that for us.
  

A lap 2020. február 12., 11:42-kori változata

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Tartalomjegyzék

Running python

Jupyterhub

  • Log into jupyter.math.bme.hu with your leibniz user and password
  • We will use Python 3
  • this is similar as you would run the following on your own machine
jupyter notebook

leibniz

  • type this into your konsole:
python3
  • you can stop by typing:
exit()

Own machine

Install Anaconda, version 3.7 is needed!

Having Anaconda you can run several programs to interact with python:

  • command line: python or ipython
  • Spyder
  • idle
  • jupyter notebook

Exercises

Introduction

  • Try the notebook from the lecture.
    • download from wiki and upload it into jupyter.math.bme.hu
  • Try a welcoming program (from terminal)!
  • Try division (integer and float)

tocelsius

Write a python function that convets from Fahrenheit to Celsius

The function should

  • be called tocelsius
  • have one parameter (called fahrenheit)
  • return the appropriate Fahrenheit degrees as float.
  • To get the Celsius, subtract 32 from the Fahrenheit value then multipy with 5 / 9.
  • See examples here

isaprime

Write a function that tells whether a number is a prime or not!

The function should be called isaprime and have one parameter:

  • x, the number in question

The function should return True or False depending on the number.

For safety reasons, you can check the type and value of the input. Accept only positive integers! If you get a non-integer or a non-positive integer, return None

roomtemp

According to Wikipedia a room has a temperature between 18°C and 25°C. Write a function that decides that for us.

The function should

  • be called roomtemp
  • have one parameter: degree the temperature of the room in Celsius degrees.
  • return either one of the following strings depending on the temperature:
    • "Too cold!"
    • "Too hot!"
    • "OK"

Mind that there is a difference between print and return

factorial

Write a function which calculates n factorial

factorial

Write a function which calculates n factorial

without 2

You should divide a positive integer n with a power of two, until it is not divisible by 2.

Call the function withouttwo with one parameter:

  • n, a positive integer
  • Return the number divided by the greatest possible power of two.

For example

1 -> 1
2 -> 1
3 -> 3
4 -> 1
6 -> 3
7 -> 7
9 -> 9
10 -> 5
100 -> 25

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