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 Related Questions A switch statement is generally best to use when you have more than two conditional expressions based on a single variable of numeric type. Latest Answer : In case of if else, the compiler need to check the condition again and again In case of switch the control directly jumps to the correct case label, so it makes it faster. ... An lvalue is an expression to which a value can be assigned. The lvalue expression is located on the left side of an assignment statement, whereas an rvalue is located on the right side of an assignment Latest Answer : lvalue is is a memory location,whose value is not constant i.e it's value is changed when a new value entered into that location.And also it can be say as, it is an expression,where left side we have an identifier and right side(rvalue) the ... An lvalue was defined as an expression to which a value can be assigned. Is an array an expression to which we can assign a value? The answer to this question is no, because an array is composed of several Latest Answer : Array is not an lvalue..Eg.int arr[5] = {"1","2",.......};here arr[5] has memory address and now we are assinging values to this.if we write arr[5]; in any function then it will not show any error, mean array does required lvalue ... The register modifier hints to the compiler that the variable will be heavily used and should be kept in the CPU’s registers, if possible, so that it can be accessed faster. There are several restrictions Latest Answer : If a variable is defined by using register modifier it tells to the compiler that the variable is used repetedly and that variable executes fastly. Generally register variables are defined in loop counters. This variable stored in CPU registers and access ... The volatile modifier is a directive to the compiler’s optimizer that operations involving this variable should not be optimized in certain ways. There are two special cases in which use of the Yes. The const modifier means that this code cannot change the value of the variable, but that does not mean that the value cannot be changed by means outside this code. For instance, in the example in Latest Answer : But isnt like the constant variables will be stored by in ROM (read only memory).Then how can the some process other than the code can change the value of const volatile ... For integral types, on a machine that uses two’s complement arithmetic (which is just about any machine you’re likely to use), a signed type can hold numbers from –2(number of bits – Latest Answer : Hi,a simple code snipet show how to determin the maximum value that an integer can haveunsigned int x = 0;--x;now check the value of x. This would contain maximum value that an interger can have.now you can determine the values containing ... A global variable that must be accessed from more than one file can and should be declared in a header file. In addition, such a variable must be defined in one source file. Variables should not be defined Latest Answer : A variable can be declare/define in a C Header without any kind of compilational/ logical errors. But it is against the coding specifications and it is not normally practiced. If proper Multiple inclusion protection macro is used, then there will be no ... Declaring a variable means describing its type to the compiler but not allocating any space for it. Defining a variable means declaring it and also allocating space to hold the variable. You can also Latest Answer : int num;This statement is declaration and also defination since it also allocates memory for variable num.But when you use following statementextern int num;It is only declaration since you are not allocating memory here. ... You can’t declare a static variable without defining it as well (this is because the storage class modifiers static and extern are mutually exclusive). A static variable can be defined in a header Latest Answer : In CThe scope of static variable is file. ie., if declared the variable is accessible accross the file.When declared the vairable in a header then its exposed to where ever its included. Every file will have a local copy. You need to extern ...
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