How to read only the first 5 Lines from a file and segmentation error 11

[KingKush]

I have 2 questions. For some reason I am getting a segmentation error and I cant figure out why. I'm new to C programming so it may be obvious but I could not find anything in my program. Here is the code:

//
//  main.c
//  head
//
//  Created by Bryant Sahota on 7/1/18.
//  Copyright © 2018 Bryant S. All rights reserved.
//


#include <stdio.h>
#include <string.h>


int main(int argc, const char * argv[]) {
    //If user doesnt specify file name
    if(argc == 1)
    {
        printf("head[OPTION][FILE]\n");
    }
    //Prints first 10 lines or all of them if fewer than 10
    else if(argc == 2)
    {
        char fileName[100];
        strcpy(fileName, argv[2]);
        FILE *fPtr;
        if ((fPtr = fopen(fileName, "r")) == NULL){
            printf("Error! opening file");
        }
        else
        {
            printf("in else");
            char fileLine[30];
            for(int i = 0; i < 10; i++)
            {
                fgets(fileLine, 30, fPtr);
            }
            
        }
    }
}

Ignore what is in the nested (second) else statement. Thats my next question. Ive been looking online how to only print the first 5 Lines of a file (or all of them if less) but I cant find anything i can understand. Can anyone push me in the right direction?

this is all that is in the file i'm trying to read from:
hello
world
Red Dead Redemption
cats and dogs
I need to
make the
file a lot longer
but now I’m done
so
I’m
Gonna
Close the file now.

[john.c]

#include <stdio.h>
#include <stdlib.h>
 
int main(int argc, char **argv) {
    if (argc != 2) {
        printf("Usage: myhead FILE\n");
        return EXIT_FAILURE;
    }
 
    FILE *fPtr = fopen(argv[1], "r");
    if (fPtr == NULL) {
        perror("Error opening file");
        return EXIT_FAILURE;
    }
 
    char line[500];
    for (int i = 0; i < 10; i++) {
        if (fgets(line, sizeof line, fPtr) == NULL)
            break;
        fputs(line, stdout);
    }
 
    return 0;
}

[KingKush]

@john.c Thanks sooo much for your help! From your code i was able to decipher what went wrong with my code. When i was assigning the filename i was out of bounds in the argv array(I used argv[2] instead of argv[1]).