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Tip of the Day
Language: C++
Expertise: Beginner
Jun 16, 1998

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Compilation Errors

Question:
What is an "lvalue"? How does it relate to "rvalue"?

Answer:
An lvalue is simply a value on the left side of an expression, and an rvalue is a value on the right side of an expression.

i = 5;
For example, here i is the lvalue and 5 is the rvalue.

The compiler sometimes uses these terms because the rules often differ for these two values. For example, while the statement above is valid, this one is not.

5 = i;
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