Ans: The main features of the C language are given below:
Ans: In C, the automatic (auto) variable of every local function is known. Local variables are known as declared variables within the function block. Also known as auto variables, the local variables are known. An automatic keyword may be used before a variable data type. If the local variable does not store a value, the value is junk.
Ans: At first, variables and constants may appear identical in that both are identifiers consisting of one or more characters (letters, numbers, and a few allowable symbols). They both have a certain worth, too. Throughout most actions and calculations, the values stored by a variable can be changed in the program. Only at the beginning of a program are constants supplied values at one time. In the software, this variable is not changed. A constant called PI can, for example, be allocated, and a value of 3.1415 can be given. Instead of 3.1415, you may write it as a PI in your program every time you need it.
Ans: In c programming, a pointer is used to indicate where a current variable is stored. If this variable is removed and the pointer still points to the same memory address, this variable is called a "dangling pointer variable."
Ans: If you declare functions, you determine if the function returns a value. If the function does not return a value, for example, when some results are shown on the screen, "void" is inserted at the left end of the function header. If a return value is expected after function execution, the return value data type is set instead of "void."