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Array Operations - Traversal, Insertion | Explanation with C Program | DSA CourseIn this note I am going to talk about various operations performed on arrays in data structure on
1d arrays specifically. I have already discussed the fundamentals of arrays what is need of Faerie
array declaration in acid ization of array memory representation of air in the previous video so if
you check out that video then I 'll provide you the link in the description box you can check out
there. We are going to write down the code for this. something like this I have already discussed
in the previous video this concept and detail fine. I 'm going to ask from the user what elements
the user wants in the area how to populate the area at runtime. We will just write header files and
all I think you can write that thing. Ask from the user that how many data the user want to insert
in this area what is the actual size of the array this is the maximum size fine. If user will give
something some input that is some integer value then obviously that value should be stored in
memory and how values to be stored using variable so you have to declare one another variable.
We will discuss how data is to be inserted in the air at specific position. If you get how data can
be inserted at a specific position then you can easily modify the code for inserting the data at the
beginning and at the end of theory fine so now we will see how to. We are using one more
variable that is i so you have to declare this variable. There is no upper bound checking concept
of areas in areas in C like this if you take hair in a is equal to 50 fine. Memory man is it has has
allocated to how many bytes two hundred bytes for storing 50 elements. If you enter the size 51
or you can say 60 then user can insert 60 values also but that is not actually correct. We all we
want all the previous element as well as we want some extra element that you want to insert so
you can not do directly this so another approach is what you can shift these elements to the right
side. From variable to start the loop we are going to start from here from the last element of
there you can say from size minus 1.
of bounds checking of arrays in c so programmer has to write down the code itself for the
checking of the boundaries in c. programmer must write down a for loop for the swapping of
arrays. Programmer writes down code that checks the boundaries of an array in c code. Just
write down a for loop in for loop you will start from 0 to the size fine and you simply write printf
percentage D and a of I and these all values would be printed this is how we are going to insert
the data at specific position fine. After inserting this number array size becomes what 6 so now
size becomes size plus plus plus right now finally you will print this area how you can print it.
How you will insert simply you just enter the data you want to insert simply. No need to ask the
position no need to do this swapping and all fine simply will write a off here here means you can
say that size a of size size size is 5 5 so here also you can insert at 6th position that is also fine
but after size plus 1 you can not insert.
In best case it is one and in worst cases it is Theta N and basically time complexity the time
taken depends on the position given. In unsorted array you have to take care of the relative
ordering of the elements in sorted array in that case you are doing two shift operations so you
can apply this shifting operations in this unsorted area.
,Arrays in Data Structure | Declaration, Initialization, Memory representation
data is to be represented in memory or you can see the memory representation of an array. you
will see what is the need of ferry what does any types of ferry how areas can be declared how
arrays can be. be. declared and how data can be stored in memory. you will see how the state
has to be stored first of all this decimal number 5 has to. be converted into binary it 's binary
number sorry that is in 32 bits. faerie explains what is need of faerie and how to deal with it.
faerie: we have to process large amount of return that is why the concept of array came now you
will modify this declaration such that under one variable name we can store roll numbers of all 60
students that is what array now how you can do this. declaration of arrays languagespecific i am
considering the syntax in c language in python maybe it 's different in pascal in you can say that
foreign language the declaration syntax would be a little bit different so it is language specific
fine now this is what the array declaration is.
The data is stored in consecutive locations or continuous locations one after another. The index
starts from zero, but can also start from one. The data is stored in binary form and the address of
the data is calculated in hexadecimal form.
At runtime, you can initialize the array using loops, maybe for loop while you do loup and some
predefined function standard functions that is scanner. In next video, I'm going to discuss it how
the data is to be taken from the user how the data is to be stored in the array. In next video, we
are going to discuss how the data is to be inserted how the arrays are to be traversed different
types of operations on 1d array first of all with their time taken. After that, we will discuss what is
2d array as well as how 2d arrays are to be accessed from the air fine.
,1.3 Array Operations | Deletion from Array | Explanation with Code | Data
Structure
I will discuss the deletion operation using the example I used in a previous video. Understanding
how to delete data from a specific position will also make it easier to delete data from the
beginning or end of the array. I declared an array of size 50 in the previous code, and the
memory manager allocated 200 bytes of memory for this array. One variable, size, is used to
determine the maximum size of the array. If the user wants to insert only 10 or 5 elements, for
example, I will ask them how much size they want for the array, and this will allocate an additional
4 bytes of memory. The user will then enter the elements of the array, which will be initialized at
runtime. To delete data from the array, I will ask the user from which position they want to delete
the data. For example, if they want to delete data from position 2, I will shift the values from
position 3 to 4 and reduce the size of the array by 1. I will start a loop from the position to be
deleted to the end of the array and shift the values to the left. To print the updated array after
deletion, I will use a for loop to print each element of the array. It's important to check the validity
of the position entered by the user before deleting data from the array. If the position is invalid,
such as -1 or greater than the size of the array, I will print "invalid position". If there is no data in
the array, it's also an underflow condition and the data cannot be deleted. When deleting data
from the end of the array, I will simply decrement the size of the array. When deleting data from
the beginning of the array, I will shift all the elements to the left and decrement the size of the
array. The time complexity of the deletion operation depends on the position from which the data
is to be deleted. If the data is to be deleted from a specific position, all the elements to the right
of that position must be shifted to the left, which takes O(n) time. However, if the array is
unsorted, a quicker algorithm is to pick the last element of the array and put it in the position to
be deleted. The best algorithm for this case takes constant time, which is O(1).
, Pointers and 2-D Arrays | Two dimensional Array | Data Structures & Algorithm
Tutorials
In this video we 'll discuss how to da Rays are related with pointers how you can access the
elements of a 2d array with the help of pointer rather than using the array name. If you have
discussed the relationship between arrays and pointers I mean that 1d array and pointers you can
check out that video also in that I button. A of 0 contains these three integer values and this is
the base address of these arrays. P can contain address of an integer variable only so this is
invalid right so here can we write P is equal to CP contains address of some another integer
variable address off integer readable so can I write here a the name of theory. If you want to print
in hexadecimal form you can write down percentage P. you fine it will print in unsigned integer
some integer value so you can print if you print in printf I guess you can. write printf % is you and
you. can write what a simply the name of the area or it will give what the address of the first
element first element is what a of 0 0 is what 100 only fine you can say that base address of this
is 100.
1d array value doesn't mean does n't mean that it is returning either six two or five because at a
over zero at this address it will return at this element. If you write this 1s trick a plus 1 then what
should be the value C this a name of the 2d array. A means same name of this 2d array it is going
to points to the first element but you can say it's going to return the address of first element. If
you do s trick a of 1 it means when you act this pointer value at this address when you is this
complete 1d array value is not single integer value. Esther explains how to print a of 1 plus 2 plus
two and you just write a straight fine. Esther says the output of this thing should be the output,
just think about it see Esther it a here step by step here in to solve this a a means it is going to
return a snake of 2d array. Esther: If you you are going to print this value then simply you can
write say this one this is same this is giving.
A straight a astray K means value at this address value is what value is this complete 1d array
fine or you can say address of its first element first element in 2d arrays this complete one dear
so it is going to return pointer to this one da find out. If you print history s trick a then what will
be the output of AD Esther that's tricky and Esther gets trick P. Address of a means it is going to
give you the address of the first element of the array. If you print a and address of a a a means
name of an array C name of there is address of a and a both will return 200 fine. If a plus one
arithmetic plus one in the pointer then it is pointing to the CUDA obviously the next element. here
1 2 1 2 the next element it is going to switch this complete array then it is. going to point this the
next. element of or you can say the next one the error that is 1 2 4 this is the difference between
this and this see I can now discuss everything in one video so it 's up to you you can try different
different different expressions like this.
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