8 - Format integers and floating point numbers

Integer formatting

• Please format an integer , Press 10 An output , Insufficient 10 Fill in the front 0

n = 1234

print(format(n, '10d'))
#  Zero filling on the left side 
print(format(n, '0>10d'))
#  Right zero padding 
print(format(n, '0<10d'))

      1234

0000001234

1234000000

Floating point format

• Format a floating point number , Keep two decimal places

x1 = 1234.5678
x2 = 58.1

#  Keep two decimal places 
print(format(x1, '0.2f'))
print(format(x2, '0.2f'))

1234.57

58.10

3. Please describe format The main usage of function

# format  The function is used to format a numeric value , Specify the formatting rule through the second parameter 

#  Right alignment 
print(format(x2, '*>12.2f'))

#  Align left 
print(format(x2, '*<12.2f'))

#  Center alignment 
print(format(x2, '*^12.2f'))

#  Divide... With thousands 
print(format(123455678, ','))

#  Use... For integers ',' Division , And keep two decimal places 
print(format(123456.12321, ',.2f'))

#  Output according to scientific counting method 
print(format(x1, 'e'))

#  Keep two decimal places , Scientific counting outputs 
print(format(x1, '0.2E'))

*******58.10

58.10*******

***58.10****

123,455,678

123,456.12

1.234568e+03

1.23E+03