Find length/size of array using sizeof() Dry Run in C

Find length/size of array using sizeof() is an interactive C dry run visualizer from the Arrays 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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Find length/size of array using sizeof() Program Code

#include <stdio.h>
int main() {
    int arr[] = {1, 2, 3, 4, 5, 6, 7, 8};
    
    // sizeof(arr) returns total bytes of array
    // sizeof(arr[0]) returns bytes of one element
    int length = sizeof(arr) / sizeof(arr[0]);
    
    printf("Total array size in bytes: %lu\n", sizeof(arr));
    printf("Size of one element: %lu\n", sizeof(arr[0]));
    printf("Number of elements: %d\n", length);
    
    return 0;
}

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