Message Boards Message Boards

2
|
1831 Views
|
0 Replies
|
2 Total Likes
View groups...
Share
Share this post:
GROUPS:

Warning to New Users: There are 7 kinds of numbers in Mathematica

Integers (Infinite Precision), Reals (Infinite Precision, Machine Precision, Arbitrary Precision), Complexes ((Infinite Precision, Machine Precision, Arbitrary Precision) with some overlap. That's why the square root of 2 returns the square root of two, to maintain the precision.

In[1]:= Element[1, Integers]

Out[1]= True

In[2]:= Precision[1]

Out[2]= \[Infinity]

In[3]:= Element[2/3, Reals]

Out[3]= True

In[4]:= Precision[2/3]

Out[4]= \[Infinity]

In[11]:= Sqrt[2]

Out[11]= Sqrt[2]

In[10]:= Precision[Sqrt[2]]

Out[10]= \[Infinity]

In[6]:= Precision[1.0]

Out[6]= MachinePrecision

In[7]:= Precision[N[1, 25]]

Out[7]= 25.

In[9]:= Element[2, Complexes]

Out[9]= True

In[8]:= Element[2 + 3 I, Complexes]

Out[8]= True

In[12]:= Precision[2 + 3 I]

Out[12]= \[Infinity]

In[13]:= Precision[N[2 + 3 I, 25]]

Out[13]= 25.
POSTED BY: Frank Kampas
Reply to this discussion
Community posts can be styled and formatted using the Markdown syntax.
Reply Preview
Attachments
Remove
or Discard

Group Abstract Group Abstract