Implement Custom strlen Function

Code

#include <stdio.h>

int custom_strlen(const char *str) {
    // Your logic here
    int i = 0;
    if(str[i] == '\0') return 0; //for empty string
    else{
        while(str[i] != '\0'){ //travers till end of string
        i++; //increamet the pointer
    }
    }
    return i; //return the end value of pointer
    
}

int main() {
    char str[101];
    fgets(str, sizeof(str), stdin);

    // Remove newline if present
    int i = 0;
    while (str[i] != '\0') {
        if (str[i] == '\n') {
            str[i] = '\0';
            break;
        }
        i++;
    }

    printf("%d", custom_strlen(str));
    return 0;
}

Solving Approach