lvalue required as left operand of assignment
//You cannot assign something to a numerical constant
int num1,num2
if (num1%num2=0) //error
//You can't assign value of num1%num2 to 0
//Instead you can check whether (num1%num2) is equal to 0 or not by:
if (num1%num2==0) // no error
3.8
11
/*lvalue means an assignable value (variable), and in assignment the left value to the = has to be lvalue (pretty clear).
Both function results and constants are not assignable (rvalues), so they are rvalues. so the order doesn't matter and if you forget to use == you will get this error. (edit:)I consider it a good practice in comparison to put the constant in the left side, so if you write = instead of ==, you will get a compilation error. for example:*/
int a = 5;
if (a = 0) // Always evaluated as false, no error.
{
//...
}
vs.
int a = 5;
if (0 = a) // Generates compilation error, you cannot assign a to 0 (rvalue)
{
//...
}
Thank you!
11
3.8
(10 Votes)
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