Delete first occurrence of a given value Dry Run in C

Delete first occurrence of a given value is an interactive C dry run visualizer from the One D programs section. Study the source code, then use the execution controls to follow each step, variable update, highlighted line, and console output.

This page provides a browser-based dry run with source-code highlighting, auto-scroll, voice narration controls, and execution output for learning the program step by step.

Delete first occurrence of a given value Program Code

#include <stdio.h>
int main() {
    int arr[] = {10, 20, 30, 20, 40}, i;
    int n = 5, key = 20, pos = -1;
    
    for(i = 0; i < n; i++) {
        if(arr[i] == key) {
            pos = i;
            break;
        }
    }
    
    if(pos != -1) {
        for(i = pos; i < n-1; i++) {
            arr[i] = arr[i+1];
        }
        n--;
    }
    
    printf("Array after deletion: ");
    for(i = 0; i < n; i++) {
        printf("%d ", arr[i]);
    }
    return 0;
}

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