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chain assignment
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This subchapter looks at chain assignment.
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This subchapter looks at chain assignment.
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This subchapter is a stub section. It will be filled in with instructional material later. For now it serves the purpose of a place holder for the order of instruction.
Professors are invited to give feedback on both the proposed contents and the propsed order of this text book. Send commentary to Milo, PO Box 1361, Tustin, California, 92781, USA.
A chain assignment is used to assign values to a series of variables. Not all programming languages have this feature.
Stanford CS Education Library This [the following section until marked as end of Stanford University items] is document #101, Essential C, in the Stanford CS Education Library. This and other educational materials are available for free at http://cslibrary.stanford.edu/. This article is free to be used, reproduced, excerpted, retransmitted, or sold so long as this notice is clearly reproduced at its beginning. Copyright 1996-2003, Nick Parlante, nick.parlante@cs.stanford.edu.
The assignment operator is the single equals sign (=).
i = 6;
i = i + 1;
The assignment operator copies the value from its right hand side to the variable on its left hand side. The assignment also acts as an expression which returns the newly assigned value. Some programmers will use that feature to write things like the following.
y = (x = 2 * x); // double x, and also put x's new value in y
Stanford CS Education Library This [the above section] is document #101, Essential C, in the Stanford CS Education Library. This and other educational materials are available for free at http://cslibrary.stanford.edu/. This article is free to be used, reproduced, excerpted, retransmitted, or sold so long as this notice is clearly reproduced at its beginning. Copyright 1996-2003, Nick Parlante, nick.parlante@cs.stanford.edu.
A series of of chain assignments will be performed from right to left.
a = b = 42
The above example will assign the value 42 to b and then assign the value of either b or 42 to a.
Parenthesis may be used to make different assignments to different variables in the chain.
a = (b = 1) -1
The above example will assign positive one to be and will assign zero to a.
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View music player in action: www.musicinpublic.com/.
Create your own copy from the original source code/ (presented for learning programming).
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Created: March 15, 2011
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