文章标题

1: Programming And Data Science

china=123
india=124
united_states=134

2: Display Values Using The Print Function

china = 123
print(china)
india = 124
print(india)
united_states = 134
print(united_states)

3: Data Types

china_name='China'
china_rounded=123
china_exact=122.5
print(china_name,china_rounded,china_exact)

4: The Type Function

china_name = "China"
china_exact = 122.5
print(type(china_exact))

5: Converting Types

china_rounded = 123
int_to_str=str(china_rounded)
str_to_int=int(int_to_str)

6: Comments

china = 123
india = 124
united_states = 134
# Number one in population.
china = 123
# Number two in population.
india = 124
# Number three in population.
united_states = 134

7: Arithmetic Operators

Addition: +.
Subtraction: -.
Multiplication: *.
Division: /.
Exponent:**.

You can use arithmetic operators to perform calculations that involve both variables and values:

india_squared = india ** 2

double_china = china * 2

china_plus_10 = china + 10
us_times_100 = united_states * 100
print(china_plus_10)
print(us_times_100)

8: Order Of Operations