Difference between arr[i] and *(arr+i) Dry Run in C

Difference between arr[i] and *(arr+i) is an interactive C dry run visualizer from the Pointersarrays programs section. Study the source code, then use the execution controls to follow each step, variable update, highlighted line, and console output.

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Difference between arr[i] and *(arr+i) Program Code

#include <stdio.h>
int main() {
    int i;
    int arr[] = {10, 20, 30, 40, 50};
    
    printf("Demonstrating equivalence:\n");
    for(i = 0; i < 5; i++) {
        printf("arr[%d] = %d, *(arr+%d) = %d", i, arr[i], i, *(arr+i));
        if(arr[i] == *(arr+i)) {
            printf(" → EQUAL\n");
        }
    }
    
    printf("\nAddress equivalence:\n");
    printf("&arr[0] = %p, arr = %p\n", &arr[0], arr);
    printf("&arr[1] = %p, arr+1 = %p\n", &arr[1], arr+1);
    printf("&arr[2] = %p, arr+2 = %p\n", &arr[2], arr+2);
    
    printf("\nWhat arr[i] means to compiler:\n");
    printf("arr[i] is converted to *(arr + i)\n");
    printf("i[arr] is also valid: 2[arr] = %d\n", 2[arr]);
    
    return 0;
}

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