Question

What are the most commonly used C library functions?

Answer 1

• printf() - Used to print output to the console.
• scanf() - Used to read input from the console.
• malloc() - Used to allocate memory dynamically.
• free() - Used to deallocate memory.
• strlen() - Used to find the length of a string.
• strcpy() - Used to copy one string to another.
• strcat() - Used to concatenate two strings.
• strcmp() - Used to compare two strings.
• fopen() - Used to open a file.
• fclose() - Used to close a file.

off the top of my head.

Answer 2

The most commonly used C library functions are:

* **printf()** and **scanf()**: These functions are used to print and scan formatted data.

* **getchar()** and **putchar()**: These functions are used to read and write a single character from/to the standard input/output.

* **strlen()** and **strcpy()**: These functions are used to get the length of a string and copy a string, respectively.

* **strcmp()** and **strncmp()**: These functions are used to compare two strings.

* **malloc()** and **free()**: These functions are used to allocate and deallocate memory dynamically.

* **exit()**: This function is used to terminate a C program.

These are just a few of the most commonly used C library functions. There are many other functions available, and the specific functions that you use will depend on the specific needs of your program.

Here is a table of the most commonly used C library functions, along with their descriptions:

| Function | Description |

|---|---|

| printf() | Prints formatted data to the standard output. |

| scanf() | Scans formatted data from the standard input. |

| getchar() | Reads a single character from the standard input. |

| putchar() | Writes a single character to the standard output. |

| strlen() | Gets the length of a string. |

| strcpy() | Copies a string. |

| strcmp() | Compares two strings. |

| strncmp() | Compares two strings for a specified number of characters. |

| malloc() | Allocates memory dynamically. |

| free() | Deallocates memory that was allocated dynamically. |

| exit() | Terminates a C program. |

I hope this helps! Let me know if you have any other questions.