Python Exercises（1）

1、

                                                  

(1)The order of operations ：First, do the multiplication and division from left to right; Then, do the addition and subtraction from left to right.

 

2、

                                                          

(1)How do I get colors in my editor?（Save our file first as a .py file, such as ex1.py. Then we'll have color when we type.）

 

3、

                      

（1）Why does the # in print("Hi # there.") not get ignored?（The # in that code is inside a string, so it will be put into the string until the ending " character is hit. So the # here is just considered as characters, not comments.）

 

4、

                  

(1)What's the difference between = and ==?（The =(single-equal) assigns the value on the right to a variable on the left.

The ==(double-equal) tests whether two things have the same value.）

(2)Can we write x=100 instead of x = 100?（Of course we can, but it's a bad form. We'd better add space around operators like this so that it's easier to read.）

 

5、

          (1)Can I make a variable like this: 1 = 'Zed Shaw' ?（No, 1 is not a valid variable name. They need to start with a character, so a1 would work.）

(2)How can I round a floating point number?（You can use the round() function like this: round(1.7333).）（四舍五入）

 

6、