Thursday, February 26, 2015

What is the difference between a string and an array?

Question:What is the difference between a string and an array??

Answer: </I>An array is an array of anything. A string is a specific kind of an array with a well-known convention to determine its length. There are two kinds of programming languages: those in which a string is just an array of characters, and those in which it's a special type. In C, a string is just an array of characters (type char), with one wrinkle: a C string always ends with a NUL character. The "value" of an array is the same as the address of (or a pointer to) the first element; so, frequently, a C string and a pointer to char are used to mean the same thing. An array can be any length. If it's passed to a function, there's no way the function can tell how long the array is supposed to be, unless some convention is used. The convention for strings is NUL termination; the last character is an ASCII NUL ('�') character. &nbsp;

Tags:Interview Questions, Languages, C,

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