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C string strncat() function

❮ string Functions


Example

Concatenate part of a string:

char myStr[20] = "Hello";
strncat(myStr, " World!", 5);
printf("%s", myStr);
Try it Yourself »

Definition and Usage

The strncat() function appends part of a string to the end of another. A number specifies the size of the part of the string to append.

The strncat() function is defined in the <string.h> header file.

Note: To append an entire string to another, use strcat() instead.


Syntax

strncat(void * destination, void * source, size_t size);

The size_t data type is a positive integer.

Parameter Values

Parameter Description
destination Required. A pointer to the string to append to. A copy of part of the source string will be appended at the position of the first null terminating character.
source Required. A pointer to the string to copy from. Data from the beginning of the string up to the position specified by the size parameter will be copied.
size Required. The number of characters to append to the destination string.

Technical Details

Returns: A char type pointer to the destination string.

❮ string Functions


Related Pages

C Strings Tutorial

C String Functions Tutorial


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