Write C program to merge two sorted array

#include <stdio.h>
#define MAX_SIZE 100 //Maximum size of the array

int main()
{
    int arr1[MAX_SIZE], arr2[MAX_SIZE], mergeArray[MAX_SIZE];
    int size1, size2, mergeSize;
    int index1, index2, mergeIndex;
    int i;

    //Reading size of the array
    printf("Enter the size of 1st array : ");
    scanf("%d", &size1);

    //Reading elements in the array
    printf("Enter elements in 1st array : ");
    for(i=0; i<size1; i++)
    {
        scanf("%d", &arr1[i]);
    }

    //Reading elements in the array
    printf("\nEnter the size of 2nd array : ");
    scanf("%d", &size2);

    //Reading elements in 2nd array
    printf("Enter elements in 2nd array : ");
    for(i=0; i<size2; i++)
    {
        scanf("%d", &arr2[i]);
    }

    mergeSize = size1 + size2;


    //Merging two array in ascending order
    index1 = 0;
    index2 = 0;
    for(mergeIndex=0; mergeIndex < mergeSize; mergeIndex++)
    {

        //If all elements of one array is merged to final array
        if(index1 >= size1 || index2 >= size2)
        {
            break;
        }


            if(arr1[index1] < arr2[index2])
        {
            mergeArray[mergeIndex] = arr1[index1];
            index1++;
        }
             else
        {
            mergeArray[mergeIndex] = arr2[index2];
            index2++;
        }
    }

    //Merging the remaining elements of array
    while(index1 < size1)
    {
        mergeArray[mergeIndex] = arr1[index1];
        mergeIndex++;
        index1++;
    }
    while(index2 < size2)
    {
        mergeArray[mergeIndex] = arr2[index2];
        mergeIndex++;
        index2++;
    }

    //Print merged array
    printf("\nArray merged in ascending order : ");
        for(i=0; i<mergeSize; i++)
    {
        printf("%d\t", mergeArray[i]);
    }

        return 0;
}

Result