7.3. Precedence of Operators¶
We have now added a number of additional operators to those we learned
in the previous chapters. It is important to understand how these
operators relate to the others with respect to operator precedence.
Python will always evaluate the arithmetic operators first (** is
highest, then multiplication/division, then addition/subtraction).
Next comes the relational operators, greater than. Finally, the
logical operators are done last. This means that the expression x*5
>= 10 and y-6 <= 20 will be evaluated so as to first perform the
arithmetic and then check the relationships. The and will be done
last. Although many programmers might place parenthesis around the
two relational expressions, it is not necessary.
The following table summarizes the precedence discussed so far from highest to lowest. See Operator precedence table for all the operators introduced in this book.
Level |
Category |
Operators |
|---|---|---|
7(high) |
exponent |
** |
6 |
multiplication |
*,/,//,% |
5 |
addition |
+,- |
4 |
relational |
==,!=,<=,>=,>,< |
3 |
logical |
not |
2 |
logical |
and |
1(low) |
logical |
or |
Check your understanding
select-3-1: Which of the following properly expresses the precedence of operators (using parentheses) in the following expression: 5*3 > 10 and 4+6==11
Here is an animation for the above expression: