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Declaring and Initializing a 1D Array in C

In this article, we will discuss how to declare and initialize a 1D array in C programming language. We will also provide a sample C program to demonstrate the concept.

Declaring a 1D Array in C

To declare a 1D array in C, you need to specify the data type of the array elements and the size of the array. The general syntax for declaring a 1D array is:


// Syntax
data_type array_name[array_size];

Here, `data_type` is the data type of the array elements, `array_name` is the name of the array, and `array_size` is the number of elements in the array.

Initializing a 1D Array in C

There are two ways to initialize a 1D array in C: static initialization and dynamic initialization.

Static Initialization

In static initialization, you can initialize the array elements at the time of declaration. The general syntax for static initialization is:


// Syntax
data_type array_name[array_size] = {value1, value2, ..., valueN};

Here, `value1`, `value2`, ..., `valueN` are the initial values of the array elements.

Dynamic Initialization

In dynamic initialization, you can initialize the array elements using a loop or other methods. The general syntax for dynamic initialization is:


// Syntax
data_type array_name[array_size];
array_name[0] = value1;
array_name[1] = value2;
...
array_name[N-1] = valueN;

Here, `value1`, `value2`, ..., `valueN` are the initial values of the array elements.

Sample C Program

Here is a sample C program that demonstrates how to declare and initialize a 1D array:


#include <stdio.h>

int main() {
    // Declare and initialize a 1D array
    int scores[5] = {90, 80, 70, 60, 50};

    // Print the array elements
    for (int i = 0; i < 5; i++) {
        printf("scores[%d] = %d\n", i, scores[i]);
    }

    return 0;
}

This program declares and initializes a 1D array `scores` with 5 elements. It then prints the array elements using a `for` loop.

Output

The output of the program is:


scores[0] = 90
scores[1] = 80
scores[2] = 70
scores[3] = 60
scores[4] = 50

Conclusion

In this article, we discussed how to declare and initialize a 1D array in C programming language. We provided a sample C program to demonstrate the concept. We hope this article helps you understand the basics of 1D arrays in C.

FAQs

Q: What is a 1D array in C?

A: A 1D array in C is a collection of elements of the same data type stored in contiguous memory locations.

Q: How do I declare a 1D array in C?

A: To declare a 1D array in C, you need to specify the data type of the array elements and the size of the array.

Q: How do I initialize a 1D array in C?

A: You can initialize a 1D array in C using static initialization or dynamic initialization.

Q: What is the difference between static initialization and dynamic initialization?

A: Static initialization initializes the array elements at the time of declaration, while dynamic initialization initializes the array elements using a loop or other methods.

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