[datawhale team learning] task02: mathematical operation, string and text, list

#（1）"print" Usage and “#” notes 
print("hello world! come along datawhale Team up and learn ！")#print Can output the contents in quotation marks ,“#” Can comment , Do not participate in program running 
print('hello world!')# Quotation marks can also be single quotation marks 

#(2) Mathematical operators 
# plus +, To add 
# minus sign -, Do subtraction 
# ride *, Multiply 
# except /, Do Division 
# to be divisible by //, Do an integer division 
# Remainder %, Take over operations 
# Power operation **, Power operation 
print(' Formula 5+2 be equal to ',5+2)# Add 
print(' Formula 5-2 be equal to ',5-2)# Subtraction 
print(' Formula 5*2 be equal to ',5*2)# Multiplication 
print(' Formula 5/2 be equal to ',5/2)# division 
print('7 to be divisible by 3 yes ',7//3)# to be divisible by 
print('7 to be divisible by 3 The remainder is ',7%3)# Remainder 
print('5 Of 2 The second power equals ',5**2)# Power operation 

#< Less than no. 
#> More than no. 
#<= Less than or equal to sign 
#>= Greater than or equal to 
print(2<5)# Compare 2 And 5, Output correctly true, error false
print(5<2)
print(5>2)
print(2<=5)
print(5<=2)
print(5>=2)

#（3） String and text 
cars=100
space_in_a_car=4
drivers=30
passengers=90
cars_not_driven=cars-drivers
cars_driven=drivers
carpool_capacity=cars_driven*space_in_a_car
average_passengers_per_car=passengers/cars_driven

print('There are',cars,'cars available.')
print('There are only',drivers,'drivers available.')

my_name='Hanson_Wu'
my_age=23
my_height=178#cm
my_weight=78#kg
my_eyes='black'
my_teeth='white'
my_hair='black'

print(f"Let's talk about {my_name}.")# Use double quotation marks here , Error in single quotation mark 
print(f"He's {my_height}cm tall.")
print(f"He's {my_weight}kg heavy.")
print("He's so handsome.")# You can't use single quotes , To use double quotes 
print(f"He's got {my_eyes} eyes and {my_hair} hair.")
print(f"His teeth are usually {my_teeth} depending on the coffee.")

total=my_age+my_height+my_weight
print(f"If I add {my_age},{my_height},and {my_weight} ,I get {total}.")


hilarious=True
joke_evaluation="Isn't that joke so funny?!{}"

print(joke_evaluation.format(hilarious))

#(4) list 
# The list is python A data type in , Support for characters 、 Numbers 、 Strings and even lists （ nesting ）.
# List with [] Express 
list1=['ggcgyy',2022,[123,' Team learning '],'abc']
list2=[' Team learning ',215,' Happy Lantern Festival ']

print(list1)
print(list2)

# Cut of values in the list 
print(list1[0])      # The first element of the output list , Left to right index default 0 Start 
print(list1[-4])     # The first element of the output list , Right to left index default -1 Start 
print(list2[1:3])    # The index number of the output list is 1、2 The elements of , barring 3
print(list1[1:])     # Output list page 2 To the last element 
print(list2*2)       # Output list 2 Time 
print(list1+list2)   # Output the combined list 

Summary ：

1、SyntaxError: invalid syntax error , It's a format error , It doesn't have to be an error in the prompt , Run the entire file , Errors in the front will affect the back , So check the entire code file

2、pycharm Check for errors in ： You can hover the mouse cursor over the red line on the right

 

  Reference resources datawhale Team up to learn the tutorial ：

See... For the learning tutorial 《 Zero basis to learn Python Programming thinking 》 course
【 Tutorial address 】https://linklearner.com/datawhale-homepage/index.html#/learn/detail/6