Arrays in Data Structure | Declaration,
Initialization, Memory representation
In this chapter we'll discuss how data is represented in memory, and
the need for arrays. Faerie explains the need for arrays as we often
have to process large amounts of data, and arrays allow us to store
multiple values under one variable name. We'll cover how arrays can
be declared and how data can be stored in memory. The declaration of
arrays is language-specific, and in this video, we'll consider the syntax
in the C language. The elements of the array are stored in consecutive
or continuous locations, with their index starting from zero. The size of
the array cannot be changed at runtime. We'll discuss how data is
stored in memory, with the binary form of the data being converted
and then stored. The formula to calculate the address of an element is
the base address plus the index value multiplied by the size of the
data type. We'll cover how to initialize the array at runtime using loops
or predefined functions, and how to take data from the user and store
it in an array. In the next video, we'll discuss how to insert data,
traverse arrays, and perform different operations on 1D arrays. We'll
also cover 2D arrays and how to access their values.
be stored in memory now as you can see theory is stored in 20 bytes
memory starting from the 0th byte and ending at the 19th byte. So
theory is stored in consecutive bytes in memory. Now If I want to
access any of these elements, I will use the indexing operator, which is
the square bracket []. So I can say here [0] that is the first element of
this array. Now if I want to access any other element. I will use the
indexing operator again and this time I will use the plus sign (+). So I
can say here [1] that is the second element of this array and so on
until I reach the last element of this array, which is [19]. So this is how
you can access any of these elements of the array using the indexing
operator [] and then using the plus sign (+) see now Another way to
initialize an array at runtime is by using a pointer variable. See now
suppose we have a pointer variable called p that points to an area in
memory that contains an array called [UNK] fine now at runtime. We
can say p->elements[0] that is referencing the first element of [UNK]
See now Another way to initialize an array at runtime is by using a
const pointer variable. See now suppose we have a const pointer
variable called p that points to an area in memory that contains an
array called [UNK] fine now at runtime. We can say const p-
>elements[0] that is referencing the first element of [UNK]. See now
Another way to initialize an array at runtime is. a dynamic pointer
variable see now suppose we have a dynamic pointer variable called P
that points to an area in memory that contains an array called [UNK]
fine. Now at runtime, we can say p->elements[0] that is referencing
the first element of [UNK], but what if we want to access more than
one element from this array at runtime. What would we do see now
suppose we want to access both [1] and [2] from this array at runtime.
Initialization, Memory representation
In this chapter we'll discuss how data is represented in memory, and
the need for arrays. Faerie explains the need for arrays as we often
have to process large amounts of data, and arrays allow us to store
multiple values under one variable name. We'll cover how arrays can
be declared and how data can be stored in memory. The declaration of
arrays is language-specific, and in this video, we'll consider the syntax
in the C language. The elements of the array are stored in consecutive
or continuous locations, with their index starting from zero. The size of
the array cannot be changed at runtime. We'll discuss how data is
stored in memory, with the binary form of the data being converted
and then stored. The formula to calculate the address of an element is
the base address plus the index value multiplied by the size of the
data type. We'll cover how to initialize the array at runtime using loops
or predefined functions, and how to take data from the user and store
it in an array. In the next video, we'll discuss how to insert data,
traverse arrays, and perform different operations on 1D arrays. We'll
also cover 2D arrays and how to access their values.
be stored in memory now as you can see theory is stored in 20 bytes
memory starting from the 0th byte and ending at the 19th byte. So
theory is stored in consecutive bytes in memory. Now If I want to
access any of these elements, I will use the indexing operator, which is
the square bracket []. So I can say here [0] that is the first element of
this array. Now if I want to access any other element. I will use the
indexing operator again and this time I will use the plus sign (+). So I
can say here [1] that is the second element of this array and so on
until I reach the last element of this array, which is [19]. So this is how
you can access any of these elements of the array using the indexing
operator [] and then using the plus sign (+) see now Another way to
initialize an array at runtime is by using a pointer variable. See now
suppose we have a pointer variable called p that points to an area in
memory that contains an array called [UNK] fine now at runtime. We
can say p->elements[0] that is referencing the first element of [UNK]
See now Another way to initialize an array at runtime is by using a
const pointer variable. See now suppose we have a const pointer
variable called p that points to an area in memory that contains an
array called [UNK] fine now at runtime. We can say const p-
>elements[0] that is referencing the first element of [UNK]. See now
Another way to initialize an array at runtime is. a dynamic pointer
variable see now suppose we have a dynamic pointer variable called P
that points to an area in memory that contains an array called [UNK]
fine. Now at runtime, we can say p->elements[0] that is referencing
the first element of [UNK], but what if we want to access more than
one element from this array at runtime. What would we do see now
suppose we want to access both [1] and [2] from this array at runtime.
