Built-in function (2)

　Math operation (7):

• abs: The function returns the absolute value of a number.
• divmod: Calculates the result of the divisor and dividend, returning a tuple (a // b, a % b) containing the quotient and remainder.
• round: Preserves the number of decimal places for floating-point numbers, and integers are reserved by default.
• pow: Find the power of x**y. (The result of the three parameters x**y is the remainder of z)

1  print (abs(-5))   # 5 
2  
3  print (divmod(7,2))   # (3, 1) 
4  
5  print (round(7/3,2))   # 2.33 
6  print (round(7/ 3))   # 2 
7  print (round(3.32567,3))   # 3.326 
8  
9  print (pow(2,3))   #The two parameters are 2**3 power 
10  print (pow(2,3,3) )   #The three parameters are the power of 2**3, and the remainder is 3.

computation

• sum: Perform a sum calculation on an iterable object (initial value can be set).
• min: Returns the minimum value of the iterable object (key can be added, the key is the function name, and the minimum value is returned through the rules of the function).
• max: Returns the maximum value of the iterable object (key can be added, the key is the function name, and the maximum value is returned through the rules of the function).

 1 print(sum([1,2,3]))
 2 #6
 3 print(sum((1,2,3),100))
 4 #106
 5 print(sum([1,2,3],100))
 6 #106
 7 print(min([1,2,-5,],key=abs))
 8 #1
 9 dic = {'a':3,'b':2,'c':1}
10 print(min(dic,key=lambda x:dic[x]))
11 #c
12 print(max([1,2,3],key=abs))
13 #3
14 print(max([1,2,-6],key=abs))
15 #-6
16 dic = {'a':3,'b':2,'c':1}
17 print(max(dic,key=lambda x:dic[x]))
18 #a

Math operation (7):