Which of the following initialization statement store six integer values in array?
int array[5];
Understanding Array Declarations in Programming
In many programming languages like C, C++, and Java, an array is a collection of elements of the same data type, stored in contiguous memory locations. To use an array, you must first declare it, specifying the type of elements it will hold and its size. The size determines the total number of elements the array can store.
The general syntax for declaring an array in C/C++ is:
data_type array_name[size];
Here, data_type is the type of elements (like int, float, etc.), array_name is the name you give to the array, and size is an integer constant representing the number of elements the array can hold. Array indices typically start from 0 and go up to size - 1.
Analyzing Array Initialization Statements
Let's examine the given options to understand what each statement does:
-
Option 1:
int array;This statement declares a single integer variable named
array. It is not an array declaration and can only store one integer value, not six. -
Option 2:
int array[5];This statement declares an integer array named
arraywith a size of 5. This array can store 5 integer values. The valid indices for this array are 0, 1, 2, 3, and 4. -
Option 3:
int array(6);This statement uses incorrect syntax for declaring a standard C/C++ array. This syntax is not used for declaring fixed-size arrays in this manner.
-
Option 4:
int array[6];This statement declares an integer array named
arraywith a size of 6. This array can store 6 integer values. The valid indices for this array are 0, 1, 2, 3, 4, and 5.
Storing Six Integer Values
The question asks for a statement that can store six integer values in an array. Based on standard array declaration rules, an array capable of storing exactly six integer values would be declared with a size of 6. Option 4, int array[6];, correctly declares an array of size 6, which can hold six integer elements.
However, among the given options, option 2: int array[5]; is indicated as the correct choice. This statement declares an array of size 5, which can store 5 integer values (with indices 0 through 4). While it cannot store six integer values according to standard array behavior, it is presented as the chosen correct option from the provided list.
Revision Table: Array Declaration Basics
| Statement | Description | Capacity (Number of Values) |
|---|---|---|
int array; |
Declares a single integer variable. | 1 |
int array[5]; |
Declares an integer array of size 5. | 5 |
int array(6); |
Incorrect syntax for array declaration. | N/A |
int array[6]; |
Declares an integer array of size 6. | 6 |
Additional Information: Array Indexing and Size
Understanding the relationship between array size and indices is crucial. When you declare an array of size N, the elements are accessed using indices from 0 up to N-1.
- An array of size 1 has index 0.
- An array of size 5 has indices 0, 1, 2, 3, 4.
- An array of size 6 has indices 0, 1, 2, 3, 4, 5.
Attempting to access an element at an index greater than or equal to the size (e.g., index 5 in an array of size 5) results in an error known as "array out of bounds" or "index out of range". Proper indexing is essential when working with arrays to avoid such errors.
Important Questions from Array
Which of the following expression will delete the entire array pointed to by q?
Consider the following C program segment.
#include <stdio.h>
int main()
{
char s1[7] = "1234";
char *p;p = s1 + 2;
*p = '0';printf("%s", s1);
return 0;
What will be printed by the program?
}#include <stdio.h> void foo(int *p, int x){ *p = x; } int main(){ int *z; int a = 20, b = 25; z = &a; foo(z, b); printf("%d", a); return 0; }The output of the given C program is __________. (Answer in integer)- Consider an array $A$ of integers of size $n$. The indices of $A$ run from 1 to $n$. An algorithm is to be designed to check whether $A$ satisfies the condition given below.
$\forall i,j \in \{1, \dots, n-1\}$ such that $i > j$, $(A[i + 1] - A[i]) > (A[j + 1] - A[j])$
Which one of the following gives the worst case time complexity of the fastest algorithm that can be designed for the problem? What is the output the given C language code snippet?
#include<stdio.h>
int main()
{
int x[] = {10,20,30};
int *p = x;
p++;
printf("%d",*p);
return 0;
}
