Scalar data types in Python

3 min readAug 19, 2021

integer data type

int: unlimited precision signed integer

>>> 10
 10 
>>> type(10)
 <class 'int'> 
>>> x = 15 
>>>x
 15 
>>> type(x)
 <class 'int'> 
>>> 0b1010
 10 
>>> bin(10)
 '0b1010' 
>>> 0o10
 8 
>>> oct(8)
 '0o10' 
>>> 0x145
 325 
>>> hex(325)
 '0x145' 
>>> int(3.5)
 3 
>>> int(-3.5)
 -3 
>>> int("496")
 496 
>>> int("1000",3)
 27

float data type

floating points are supported by float type.
python floats are implemented IEEE-754 double-precision with 53-bits of binary precision.
This is equivalent to 15–16 significant digits in decimal.

>>> 3.125
 3.125 
>>> 3e8
 300000000.0 
>>> 1.616e-35
 1.616e-35 
>>> x = 3.14 
>>> x 3.14 
>>> type(x)
 <class 'float'> 
>>> float(7)
 7.0 
>>> float("1.618") 
1.618 
>>> float("nan")
 nan 
>>> float("inf")
 inf 
>>> float("-inf")
 -inf 
>>> 3.0+1
 4.0

None data type

python has special null value called “None”.
None is frequently reprsent the absent of value.

>>> None 
>>> a=None 
>>> a is None
 True 
>>> type(None)
 <class 'NoneType'>

bool data type

Boolean logical values used in control structures

>>> True
 True 
>>> False
 False 
>>> bool(0)
 False 
>>> bool(42)
 True 
>>> bool(-1)
 True 
>>> bool(0.0)
 False 
>>> bool(0.207)
 True 
>>> bool(-1.117)
 True 
>>> bool([])
 False 
>>> bool([1,5,9])
 True 
>>> bool("")
 False 
>>> bool("spam")
 True 
>>> bool("False")
 True 
>>> bool("True")
 True

Bool values commonly produces by python relational operators.
Relational operators are used to comparing the objects.

>>> g=20 
>>> g == 20
 True 
>>> g == 13
 False 
>>> g!= 20
 False 
>>> g < 30
 True 
>>> g <= 20
 True 
>>> g>30
 False 
>>> g >= 20
 True

control flow :

conditional statement :

Branch execution based on the value of an expression. if :

Syntax:

if expression:
        block

Example:

>>> if True:
 ...     print("It's true!")
 ...
 It's true! 
>>> if False:
 ...     print('It's false!')
 ...
>>> if bool('eggs'):
 ...     print('Yes please!')
 ...
 Yes please! 
>>> if "eggs":
 ...     print("Yes please!")
 ...
 Yes please!

else clause:

>>> h=42 
>>> if h>50:
 ...     print('Greater than 50')
 ... else:
 ...     print('50 or smaller')
 50 or smaller 
>>> if h > 50 :
 ...     print('Greater than 50')
 ... else:
 ...     if h<20:
 ...         print('Lessthan 20')
 ...     else:
 ...         print('Between 20 and 50')
 Between 20 and 50 
>>> if h>50:
 ...     print('Greater than 50')
 ... elif h<20:
 ...     print('less than 50')
 ... else:
 ...     print('Between 20 and 50')
 Between 20 and 50

while Loops:

Syntax:

while expression:
    <body>

example:

>>> c = 5 
>>> while c!=0:
 ...     print(c)
 ...     c-=1
 ...
 5
 4
 3
 2
 1
>>> c=5 
>>> while c:
 ...     print(c)
 ...     c-=1
 ...
 5
 4
 3
 2
 1

while loop often used as infinite loops in python.

>>> while True:
 ...     pass
 ...
 press ctrl+c KeyboardInterrup

break: Many programming languages support a loop ending in predicate test.

python requires to use while True and break

break jumps out of the inner-most executing loop the line immediately after it.

>>> while True:
 ...     response = input()
 ...     if int(response)%7 == 0 :
 ...         break
 ...
 12
 24
 67
 34
 28

Int truthiness

>>> bool(5) == True
 True 
>>> bool(4) == True
 True 
>>> bool(0) == False
 False

For more visit: https://playwithpython.xyz