Understand lvalue and rvalue in C ..

[Humble]

lvalue :

There are 2 interpretations for lvalue and those are

1) locator value
2) Left hand side value

Any of the above will do, but its where the value is getting stored.. lvalue can be again divided into 2 forms .. modifiable or unmodifiable value..

Unmodifiable lvalues :
For ex: arrays, ‘const’ variables, An object is a structure or union type and one of its members has a const-qualified type

rvalue

Can be interpreted as right hand side value . its the value getting assigned or read in an expression.

Some operators require lvalues for some of their operands.
The operands must be lvalues.

For ex:

1) &
2) ++
3) —

For some others, Left operand must be an lvalue.

= += -= *= %= <<= >>= &= ^= |=

All lvalues are rvalues but all rvalues are not lvalues.

[Humble]

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