Little Turtle Python Video Third lecture (notes and after-school exercise answers)

1. Rules for variable naming:

1. Variables are assigned before they are used.

2 variables can be letters, underscores, numbers, but cannot start with a number.

The 3 variables are case-sensitive and represent different meanings.

PS: In Python, you just paste the value into a variable, not a store, so you can think of no variable in Python.

2. String

The use of strings is to be noted for consistency

PS: Use of quotation marks in strings

' let\ ' s go '

Result is

3. Use of backslashes

" C:\file " Print  "c:\\file"print"C:\file\now"  Print= R"C:\file\now"print str

The result is:

Effect of the last three single quotes:

" " I'm a boy, I love life, I'm a foodie, and I'm a literary youth . " " Print str

Or

" " I am a boy,\n, I love life, \ n I am a foodie, I am still a literary youth. Print STR

The results were:

Summing up today, we learned about the use rules of variables, the meaning of strings, the backslash, and the effect of three single quotes.

4. After-school assignments:

daysperyear = 365= = = = Daysperyear * HoursPerDay * minutesperhour * Secon DsperminutePrint(Result)

Little Turtle Python Video Third lecture (notes and after-school exercise answers)