Python_G-004 : 10 basic operations & functions

 

10 Basic Operations

Basic math operations	2 + 3, 5 - 1, 4 * 2, 8 / 2, 5 % 2   # output 1
Assign values to variables	a = 5, b += 3    # b = b+3 c *= 2     # c = c*2
Compare values	a == b    # equal a != b     # not equal a > b a < b
Logical operations	a and b a or b not a
Bit-level operations	a & b, `a	b,a ^ b,~a,a << b,a >> b`
Test for membership in sequences	'a' in 'abc', 3 not in [1, 2, 4]
Compare object identities	a is b, a is not b
Operations on lists	len(list), list.append(4), list[0]
Operations on strings	str1 + str2, str1 * 3, len(str1)
Operations on dictionaries	dict.keys(), dict.values(), dict['key']

 

10 Basic Functions

print()	Prints the specified message to the console	print("Hello, world!")
len()	Returns the length (number of items) of an object	len([1, 2, 3])         # Output: 3
type()	Returns the type of an object	type(42)           # Output: <class 'int'>
int()	Converts a value to an integer	int(3.14)           # Output: 3
str()	Converts a value to a string	str(42)           # Output: "42"
list()	Converts a value to a list	list((1, 2, 3))            # Output: [1, 2, 3]
sum()	Returns the sum of all items in an iterable	sum([1, 2, 3, 4])           # Output: 10
max()	Returns the largest item in an iterable	max([1, 2, 3, 4])           # Output: 4
min()	Returns the smallest item in an iterable	min([1, 2, 3, 4])           # Output: 1
range()	Generates a sequence of numbers  range( n ) : 0 to (n-1)  range( x, y ) : x to (y-1)	for i in range(5): print(i)       # Output: 0, 1, 2, 3, 4