2.1. Type Int¶
2.1.1. Type Definition¶
In Python 3 there is not maximal
intvaluePython 3 dynamically extends
int, when it's too bigYou can use
_for easier read especially with big numbers
data = 1337 # 1337
data = -1337 # -1337
million = 1000000 # 1000000
million = 1_000_000 # 1000000
2.1.2. Type Casting¶
int()- converts argument toint
int()- does not round numbers
int(13) # 13
int(13.0) # 13
int(13.3) # 13
int(13.37) # 13
int(-13.37) # -13
int('1') # 1
int('+1') # 1
int('-1') # -1
int('1_000_000') # 1000000
int('13.37') # ValueError: invalid literal for int() with base 10: '13.37'
int('13,37') # ValueError: invalid literal for int() with base 10: '13,37'
int('-13.37') # ValueError: invalid literal for int() with base 10: '-13.37'
int('-13,37') # ValueError: invalid literal for int() with base 10: '-13,37'
2.1.3. Type Checking¶
type()- Returns type of an argument
type(1) # <class 'int'>
type(-1) # <class 'int'>
type(0) # <class 'int'>
type(-0) # <class 'int'>
2.1.4. Assignments¶
2.1.4.1. Type Int Time¶
Complexity level: easy
Lines of code to write: 12 lines
Estimated time of completion: 5 min
Solution:
solution/type_int_time.py
- English
Calculate how many seconds is one day
Calculate how many minutes is one day
Calculate how many seconds is work day (8 hours)
Calculate how many hours is work month (22 work days)
Calculate how many minutes is work week (5 work days)
- Polish
Oblicz ile sekund to jedna doba
Oblicz ile minut to je jedna doba
Oblicz ile sekund to dzień pracy (8 godzin)
Oblicz ile godzin to miesiąc pracy (22 dni pracy)
Oblicz ile minut to tydzień pracy (5 dni pracy)
- The whys and wherefores
Defining constants and variables
Naming convention
Mathematical operations
- Hint
1 h = 60 min
1 min = 60 s
2.1.4.2. Type Int Bytes¶
Complexity level: medium
Lines of code to write: 9 lines
Estimated time of completion: 3 min
Solution:
solution/type_int_bytes.py
- English
File size is one megabyte
Calculate size in bits
Calculate size in megabits
- Polish
Wielkość pliku to jeden megabajt
Oblicz wielkość w bitach
Oblicz wielkość w megabitach
- The whys and wherefores
Defining constants and variables
Naming convention
Mathematical operations
- Hint
1 Kb = 1024 b
1 Mb = 1024 Kb
1 B = 8 b
1 KB = 1024 B
1 MB = 1024 KB
2.1.4.3. Type Int Bandwidth¶
Complexity level: easy
Lines of code to write: 10 lines
Estimated time of completion: 5 min
Solution:
solution/type_int_bandwidth.py
- English
Having internet connection with speed up to 100 Mb/s
How long will take to download 100 MB?
- Polish
Mając łącze internetowe "do 100 Mb/s"
Ile zajmie ściągnięcie pliku 100 MB?
- The whys and wherefores
Defining constants and variables
Naming convention
Mathematical operations
- Hint
1 Kb = 1024 b
1 Mb = 1024 Kb
1 B = 8 b
1 KB = 1024 B
1 MB = 1024 KB
2.1.4.4. Type Int Temperature¶
Complexity level: medium
Lines of code to write: 18 lines
Estimated time of completion: 8 min
Solution:
solution/type_int_temperature.py
- English
One Kelvin is equal to 1 Celsius degree (1K = 1°C)
Zero Kelvin (absolute) is equal to -273.15 Celsius degrees
For calculation use round number -273 (0K = -273°C)
How many Kelvins and Celsius degrees has average temperatures at surface [dACSICINTA19]:
Lunar day: 453 K
Lunar night: 93 K
Mars highest: 20 °C
Mars lowest: -153 °C
Mars average: −63 °C
- Polish
Jeden Kelwin to jeden stopień Celsiusza (1K = 1°C)
Zero Kelwina (bezwzględne) to -273.15 stopni Celsiusza
W zadaniu przyjmij równe -273°C (0K = -273°C)
Ile Kelwinów, a ile stopni Celsiusza wynoszą średnie temperatury powierzchni [dACSICINTA19]:
Księżyca w dzień: 453 K
Księżyca w nocy: 93 K
Mars najwyższa: 20 °C
Mars najniższa: -153 °C
Mars średnia: −63 °C
- The whys and wherefores
Defining constants and variables
Naming convention
Print formatting
Mathematical operations