Day 6 of pyhon

1、 Data type conversion ：
  Will float , String to integer

  The integer , String to floating point

  Binary , octal ,16 Base to 10 Base number

  take 10 Base to zero , Binary system , octal ,16 Base number

  Convert string to byte

  Convert bytes to strings

  take ascii Code to string

 
  Converts a string to ascii code

2. Conditional control statements
  A: 86-100, B: 71-85, C: 61-70, D: 0-60
  Enter a grade and print out the grade ( Required if ... elif)