From 7bace4bfe4cf6dcfd7bfe4974cea102421f00f02 Mon Sep 17 00:00:00 2001
From: Blaise Li <blaise.li__git@nsup.org>
Date: Mon, 13 Jun 2022 15:59:40 +0200
Subject: [PATCH] Update exercise with divisions.
---
source/Data_Types.rst | 37 +++++++++++++------------------------
1 file changed, 13 insertions(+), 24 deletions(-)
diff --git a/source/Data_Types.rst b/source/Data_Types.rst
index c83d01c..e36ec6b 100644
--- a/source/Data_Types.rst
+++ b/source/Data_Types.rst
@@ -17,39 +17,28 @@ Assume that we execute the following assignment statements: ::
width = 17
height = 12.0
- delimiter ='.'
For each of the following expressions, write the value of the expression and the type (of the value of
the expression) and explain.
#. width / 2
- #. width / 2.0
+ #. width // 2
#. height / 3
#. 1 + 2 * 5
-
-Use the Python interpreter to check your answers. ::
- >>> width = 17
- >>> height = 12.0
- >>> delimiter ='.'
- >>>
- >>> width / 2
- 8
- >>> # both operands are integer so python done an euclidian division and threw out the remainder
- >>> width / 2.0
- 8.5
- >>> height / 3
- 4.0
- >>> # one of the operand is a float (2.0 or height) then python pyhton perform a float division but keep in mind that float numbers are approximation.
- >>> # if you need precision you need to use Decimal. But operations on Decimal are slow and float offer quite enough precision
- >>> # so we use decimal only if wee need great precision
- >>> # Euclidian division
- >>> 2 // 3
- 0
- >>> # float division
- >>> 2 / 3
- 0.6666666666666666
+Use the Python interpreter to check your answers. ::
+ >>> width = 17
+ >>> height = 12.0
+ >>> width / 2
+ 8.5
+ >>> width // 2
+ 8
+ >>> # // is to perform an euclidean division
+ >>> height / 3
+ 4.0
+ >>> 1 + 2 * 5
+ 11
Exercise
--
GitLab