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In the following code:
int c;
while((c=10)>0)
What does c = 10 evaluate to? Is it 1 which indicates that the value 10 is assigned to variable c successfully, or is it 10? Why?
795
In most expression-oriented programming languages (for example, C), the assignment statement returns the assigned value, allowing such idioms as x = y = a , in which the assignment statement y = a returns the value of a , which is then assigned to x .
An assignment expression has the value of the left operand after the assignment, but is not an lvalue.
The assignment operator = assigns the value of its right-hand operand to a variable, a property, or an indexer element given by its left-hand operand. The result of an assignment expression is the value assigned to the left-hand operand.
c = 10 is an expression returning 10 which also assigns 10 to c.
74
It is said in C99 6.5.16
An assignment operator stores a value in the object designated by the left operand. An
assignment expression has the value of the left operand after the assignment, but is not an
lvalue.
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