What Does Null Mean in Computer System?

In a computer program, a null is a value and an identifier. Null is a built-in item with a value of zero. It is the same as the 0 characters used to cut cables in C.Null and can be a pointer value, similar to zero, unless the CPU supports a specific identifier pattern.

What Is a Valuable Value?

In the database, zero is a value. Valuable value means no value exists. When used as a value, null is not a memory location. Only clues that control memory locations. Without a blank letter, the cord would not break properly, which could cause problems.

What is the Null index?

System C and C ++, the pointer, holds the memory space. A null identifier is an identifier that intentionally points to nothing. If you do not have an address to assign a reference to, you can use null. Valuable value avoids memory leaks and interruptions in applications that contain clues. An example of a useless identifier in C is:

int main ()
  int * ptr = NO;
  print ("Ptr value is% u", ptr);
  return 0;

Note: In C, null macro may have a void * type but this is not allowed in C ++.

NULL in C #

In C #, null means "nothing." Details about its use in C # include:

You can't use 0 instead of not working in your programs even if null is represented by a value of 0.

You can use null for any type of reference including layouts, cables, and custom types.

In C #, null is not the same as a fixed zero.

Example :

<html> <body> <h4>Knowledge2life</h4> <p id="demo"></p> <script> document.getElementById("demo").innerHTML = typeof undefined + "<br>" + typeof null + "<br><br>" + (null === undefined) + "<br>" + (null == undefined); </script> </body> </html>