Copy first n characters using strncpy() Dry Run in C

Copy first n characters using strncpy() is an interactive C dry run visualizer from the String Functions 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.

Copy first n characters using strncpy() Program Code

#include <stdio.h>
#include <string.h>
int main() {
    char source[] = "Hello World";
    char destination[20];
    int n = 5;
    
    strncpy(destination, source, n);
    destination[n] = '\0';  // Manual null termination
    
    printf("Source: %s\n", source);
    printf("First %d chars: %s\n", n, destination);
    
    return 0;
}

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