All C inbuilt functions which are declared in stdlib.h header file are given below.
LIST OF INBUILT C FUNCTIONS IN STDLIB.H FILE:
|
Function
|
Description
|
| malloc() | This function is used to allocate space in memory during the execution of the program. |
| calloc() | This function is also like malloc () function. But calloc () initializes the allocated memory to zero. But, malloc() doesn’t |
| realloc() | This function modifies the allocated memory size by malloc () and calloc () functions to new size |
| free() | This function frees the allocated memory by malloc (), calloc (), realloc () functions and returns the memory to the system. |
| abs() | This function returns the absolute value of an integer . The absolute value of a number is always positive. Only integer values are supported in C. |
| div() | This function performs division operation |
| abort() | It terminates the C program |
| exit() | This function terminates the program and does not return any value |
| system() | This function is used to execute commands outside the C program. |
| atoi() | Converts string to int |
| atol() | Converts string to long |
| atof() | Converts string to float |
| strtod() | Converts string to double |
| strtol() | Converts string to long |
| getenv() | This function gets the current value of the environment variable |
| setenv() | This function sets the value for environment variable |
| putenv() | This function modifies the value for environment variable |
| perror() | This function displays most recent error that happened during library function call. |
| rand() | This function returns the random integer numbers |
| delay() | This function Suspends the execution of the program for particular time |
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