Initialize array at time of declaration (Different methods) Dry Run in C

Initialize array at time of declaration (Different methods) 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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Initialize array at time of declaration (Different methods) Program Code

#include <stdio.h>
int main() {
    // Method 1: Full initialization
    int arr1[5] = {1, 2, 3, 4, 5}, i;
    
    // Method 2: Partial initialization (remaining become 0)
    int arr2[5] = {1, 2, 3};
    
    // Method 3: Size omitted (compiler determines size)
    int arr3[] = {10, 20, 30, 40};
    
    // Method 4: Initialize all to zero
    int arr4[5] = {0};
    
    for(i = 0; i < 5; i++)
        printf("%d ", arr1[i]);
    printf("\n");
    
    for(i = 0; i < 5; i++)
        printf("%d ", arr2[i]);
    printf("\n");
    
    for(i = 0; i < 4; i++)
        printf("%d ", arr3[i]);
    
    return 0;
}

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