Create an array of size 10, input values and print the array, and search an element in the array

array_operations.c

#include <stdio.h>

int main() {
    int arr[10];         // Step 1: Declare an array of size 10
    int i, search, found = 0;

    // Step 2: Input 10 elements from the user
    printf("Enter 10 integers:\n");
    for(i = 0; i < 10; i++) {
        printf("Element %d: ", i + 1);
        scanf("%d", &arr[i]);
    }

    // Step 3: Print the array
    printf("\nThe array is:\n");
    for(i = 0; i < 10; i++) {
        printf("%d ", arr[i]);
    }

    // Step 4: Search for an element
    printf("\n\nEnter the number to search: ");
    scanf("%d", &search);

    for(i = 0; i < 10; i++) {
        if(arr[i] == search) {
            printf("%d found at position %d (index %d)\n", search, i + 1, i);
            found = 1;
            break;
        }
    }

    if(!found) {
        printf("%d not found in the array.\n", search);
    }

    return 0;
}

🧠 Step-by-Step Explanation

🔹 Step 1: Declare an array

int arr[10];

• This line creates an integer array of size 10
• It can store 10 elements of type int
• Array indices range from 0 to 9

🔹 Step 2: Take input from the user

for(i = 0; i < 10; i++) {
    scanf("%d", &arr[i]);
}

• This loop runs from 0 to 9 (10 iterations)
• We use scanf() to take user input
• Each input is stored in consecutive array indices
• &arr[i] gets the memory address of each element

🔹 Step 3: Display the array

for(i = 0; i < 10; i++) {
    printf("%d ", arr[i]);
}

• Prints each element of the array
• Elements are separated by spaces
• Output appears on a single line

🔹 Step 4: Search for an element

scanf("%d", &search);
for(i = 0; i < 10; i++) {
    if(arr[i] == search) {
        // Print the found message
        break;
    }
}

• First reads the number to search for
• Linear search through the array elements
• Compares each element with search value
• If found, prints position and breaks the loop
• If not found, displays appropriate message

🖨️ Sample Output:

Enter 10 integers:
Element 1: 12
Element 2: 34
Element 3: 56
Element 4: 78
Element 5: 90
Element 6: 11
Element 7: 23
Element 8: 45
Element 9: 66
Element 10: 67

The array is:
12 34 56 78 90 11 23 45 66 67

Enter the number to search: 90
90 found at position 5 (index 4)

💡 Key Concepts:

• Array Declaration: Specifies size and type at compile time
• Zero-based Indexing: First element is at index 0
• Linear Search: Simple search algorithm checking each element sequentially
• Loop Control: for loops provide precise iteration control
• I/O Operations: printf and scanf for console input/output