This document discusses string handling functions in C. It defines a string as a character array terminated by a null character. It notes that string handling functions are defined in the string.h header file and can perform operations like copying, concatenating, comparing, and getting the length of strings. It provides examples of common string functions like strcpy(), strlen(), strcat(), strcmp(), and discusses what each one does.

1. String Handling Functions
21CSC2T411: Programming in C
SIMMI S
Assistant Professor
Department Of Computer Science(UG)
Kristu Jayanti College,Autonomous
Bengaluru -560077,India

2. Strings
The string can be defined as the one-dimensional array of characters
terminated by a null ('0') character.
The character array or the string is used to manipulate text such as
word or sentences.
The termination character ('0') is important in a string since it is the
only way to identify where the string ends.
Simmi S,Department of Computer Science

3. Syntax: char string_name[size];
char name[10]; //Declaration
char name[]=“rose”; //Declaration and Initialization
char name[]={‘r’,’o’,’s’,’e’,’0’} //Declaration and Initialization
Declaring String
Simmi S,Department of Computer Science

4. String Handling Functions
• The C string functions are built-in functions that can be used for
various operations and manipulations on strings.
• These string functions can be used to perform tasks such as string
copy, concatenation, comparison, length, etc.
• The string handling functions are defined in a header file
called string.h.
Simmi S,Department of Computer Science

5. Types Of String Handling Functions
Function Syntax (or) Example Description
strcpy() strcpy(string1, string2) Copies string2 value into string1
strncpy() strncpy(string1, string2, 5) Copies first 5 characters string2 into string1
strlen() strlen(string1) Returns total number of characters in string1
strcat() strcat(string1,string2) Appends string2 to string1
strncat() strncpy(string1, string2, 4) Appends first 4 characters of string2 to string1
strcmp() strcmp(string1, string2) Returns 0 if string1 and string2 are the same;
less than 0 if string1<string2; greater than 0 if
string1>string2
strncmp() strncmp(string1, string2, 4) Compares first 4 characters of both string1 and
string2
Simmi S,Department of Computer Science

6. strlen()
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7. strcpy() & strncpy()
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8. strcmp() & strncmp()
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9. strcat() & strcat()
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10. Simmi S,Department of Computer Science
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