What\'s the Difference: char* vs. char[] in C?

Deciphering the Distinction: char* vs. char[]

In the realm of C programming, the subtle differences between char str[] and char *str can be a source of confusion. Delving deeper into their nature unveils the intrinsic disparities between an array and a pointer.

char str[]: An Array's Embrace

When declared as char str[] = "Test", the variable str becomes an array of characters. The contents of the string literal "Test" are dutifully replicated within this array. As the array's proprietor, str wields full control over this internal storage.

char *str: A Pointer's Point of Reference

In contrast, the declaration char *str = "Test"; creates a pointer variable. Here, str serves as a beacon, directing its gaze toward the literal string "Test." Unlike an array, a pointer merely gestures towards external memory; it does not possess its own storage space.

The Core Distinction: Ownership and Immutability

The fundamental difference between these two constructs lies in their ownership and immutability characteristics. The array str[] assumes ownership of the characters it contains, while the pointer str remains an outsider, referencing existing data. Moreover, the contents pointed to by *str are immutable, meaning they cannot be altered.

In essence, char str[] = "Test"; represents an array that owns a modifiable copy of the string, while char *str = "Test"; signifies a pointer that points to a constant, unchangeable string literal. Understanding this distinction is paramount for navigating the complexities of C programming.

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