How to sort an int array in c

void swap(int* xp, int* yp)
{
    int temp = *xp;
    *xp = *yp;
    *yp = temp;
}
 
// Function to perform Selection Sort
void selectionSort(int arr[], int n)
{
    int i, j, min_idx;
 
    // One by one move boundary of unsorted subarray
    for (i = 0; i < n - 1; i++) {
 
        // Find the minimum element in unsorted array
        min_idx = i;
        for (j = i + 1; j < n; j++)
            if (arr[j] < arr[min_idx])
                min_idx = j;
 
        // Swap the found minimum element
        // with the first element
        swap(&arr[min_idx], &arr[i]);
    }
}

// n is the size of the array

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