C mai pointer kya hota hai or iska kya kaam hota hai

 Hey guys welcome back to another video by simply done in today's video we're going to be learning all about point essentially but before we begin if you haven't subscribed to our channel already make sure to hit the subscribe button and the bell icon to never miss an update so now without any further delay let's begin this session will help you to understand what pointers in c .

 Next pointer declaration later let's understand the pointer to an array and followed by a pointer to function and finally a pointer to pointer now let's get started with what a pointer in c is a pointer is a variable that holds the address of another variable to be executed which can be of data type int care array etc pointers are used so that we can easily access the memory location .

 And it reduces the storage space pointers also help us to increase the speed of a program's execution let's look at the example int asterisk p where p is a pointer variable holding address of another variable of type integer similarly a pointer variable can hold the address of a variable type cad float array etc now let's look at the pointer declaration .

 We have data type followed by asterisk symbol and name of a pointer variable to assign a variable to a pointer we use ampersand symbol so for example let's declare a variable of type int after that let's declare a pointer variable that is p and then a variable a is assigned to a point of variable p so this means that a pointer is holding the address of a variable type in now let's look at the diagram and understand how pointers work in c .

 Language so basically when we declare a variable memories are located and the value of a variable is stored in that memory at some address so in this example let's consider the address to be 2000 similarly when a pointer is declared memory spaces are located at address thousand and the value stored in that memory is the address of a variable a now let's execute a program using pointers .

 So in this particular program we have assigned a variable a to a pointer variable p so now p is holding the address of va and we are trying to print the edges of pointer variable p and the address of a variable e let's run it as you can see the output the pointer variable p holding the address of a variable a is similar to the address of a variable a holding a value 5. 

 Up next we have a c pointer to an array an array is a collection of homogeneous elements having same name and type c uses a pointer to an array to reduce the memory space of the program code in a pointer to an array the address of the first element of an array is assigned to the point of variable let's consider the below example where we have declared and initialize the array of elements and then the first element of an array is assigned to the .

 Point of variable p once the base address is assigned the other elements of an array can be easily accessible suppose the array elements are 5 10 15 20 and 25 and they are stored adjacent in the memory then the memory space is allocated to the point of variable at some address and it holds the address of the first element .

 Then by incrementing the pointer variable by 1 the address of the next element of an array will be stored in the pointer p considering the below example so once the pointer is incremented by 1 the address 1 0 0 1 will be stored in the pointer p now let's look at the example program using a pointer to array choose from over 300 in demand skills and get access to 1 000 plus hours .

 Video content for free visit scale up by simply learn click on the link in the description to know more as you can see from this program we will fetch the address of an array element so for that we have assigned a variable a to the pointer p and with the help of for loop we can access the address of the next element by incrementing the point of variable p so now let's run the program and look .

 The output as you can see we got the address of all the elements in the array now that we know pointer to array in c language let's move ahead and understand pointer to function in c as we all know the function is a set of statements that perform a certain task to generate an output syntax to declare a pointer to a function is return type point of variable followed by list of arguments .

 To understand a little more about pointers to function let's run a program so in this particular program we have a print function in which we are performing addition operation and we are trying to get the address of a function by assigning the function name to the pointer variable so this pointer to a function must accept two integer basically it's holding the address of a function print.

 Now let's run it so successfully we got an output using a pointer to a function we got the value of a and b is five and three so the sum is eight and the point of variable p holding address of a function is four one nine and seven eight which is similar to the address of a function let's now look at the pointer to pointer pointer to pointer is nothing but a pointer variable holds the address .

 Another point of variable for example first we have declared the integer pointer variable p and in the second declaration we have ptr which holds the address of another integer point of variable p let's understand better by looking at the diagram so here variable a is holding a value 5 at the address 2009 and the pointer variable p is holding the address of a variable .

 Another pointer variable ptr is holding the address to 1000 of the integer point of variable p hope you got a clear idea of how pointer to pointer in c works so with this we have come to the end of this session on the pointers in c i hope this session was informative and interesting until next time thank you stay safe and keep learning hi there if you like this video subscribe to the simply learn youtube.