What does 0 stand for

Question

Possible Duplicate    What does the  0 symbol mean in a C string        I am new at iPhone Development  I want to know  what does   0  means in C  and what is the equivalent for that in objective c

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0 is zero character  In C it is mostly used to indicate the termination of a character string  Of course it is a regular character and may be used as such but this is rarely the case   The simpler versions of the built-in string manipulation functions in C require that your string is null-terminated or ends with  0

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In C   0 denotes a character with value zero  The following are identical   char a   0  char b     0     The utility of this escape sequence is greater inside string literals  which are arrays of characters   char arr      abc 0def 0ghi 0      Note that this array has two zero characters at the end  since string literals include a hidden  implicit terminal zero

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It means   0  is a NULL character in C  don t know about Objective-C but its probably the same

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To the C language    0  means exactly the same thing as the integer constant 0  same value zero  same type int    To someone reading the code  writing   0  suggests that you re planning to use this particular zero as a character

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In C  0 is a character literal constant store into an int data type that represent the character with value of 0   Since Objective-C is a strict superset of C this constant is retained

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The null character   0   also null terminator   abbreviated NUL  is a control character with the value zero  Its the same in C and objective C  The character has much more significance in C and it serves as a reserved character used to signify the end of a string often called a null-terminated string  The length of a C string  an array containing the characters and terminated with a   0  character  is found by searching for the  first  NUL byte

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The   0  inside character literals and string literals stands for the character with the code zero  The meaning in C and in Objective C is identical   To illustrate  you can use  0 in an array initializer to construct an array equivalent to a null-terminated string   char str1      Hello   char str2       H    e    l    l    o     0      In general  you can use  ooo to represent an ASCII character in octal notation  where os stand for up to three octal digits

[objective-c] What does \0 stand for?

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