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Needs

Needs["context`"]
loads an appropriate file if the specified context is not already in $Packages.
Needs["context`", "file"]
loads file if the specified context is not already in $Packages.
  • Needs["context`"] calls Get["context`"]. By convention, the file loaded in this way is the one which contains a package that defines context`.
  • Needs["file`"] typically reads in a file named file.m.
EXAMPLESCLOSE ALL
Basic Examples   (1)
Read in the file for the Computer Arithmetic Package if it has not already been read:
In[1]:=
Click for copyable input
The commands defined by the package are ready for use:
In[2]:=
Click for copyable input
In[3]:=
Click for copyable input
Out[3]=
New in 1
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