string.h)

The `#include ` directive includes the string manipulation header file in your C program. The `string.h` header provides functions for manipulating strings and working with character arrays. Here are some commonly used functions provided by `string.h`: 1. String Manipulation: - `strcpy()`: Copies a string from source to destination. - `strcat()`: Concatenates (appends) one string to another. - `strlen()`: Calculates the length of a string. - `strcmp()`: Compares two strings lexicographically. - `strchr()`: Finds the first occurrence of a character in a string. - `strstr()`: Finds the first occurrence of a substring in a string. 2. Memory Operations: - `memset()`: Sets a block of memory with a particular value. - `memcpy()`: Copies a block of memory from source to destination. 3. String Conversion: - `atoi()`: Converts a string to an integer. - `atof()`: Converts a string to a floating-point number. 4. Tokenization: - `strtok()`: Breaks a string into a sequence of tokens based on specified delimiters. 5. String Comparison and Searching: - `strncmp()`: Compares two strings up to a specified number of characters. - `strncasecmp()`: Case-insensitive comparison of two strings up to a specified number of characters. - `strpbrk()`: Searches a string for any of a set of specified characters. 6. Other Operations: - `strrev()`: Reverses a string in place. - `strncpy()`: Copies a specified number of characters from source to destination. These functions, along with additional macros and types, assist in string manipulation, memory operations, string conversion, tokenization, string comparison, and searching. By including `string.h` in your program, you can utilize these functions to work with strings effectively in your C program.

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