The function rand () in C

The function int rand (void) returns a random number in the range from 0 to RAND_MAX.

RAND_MAX is a constant with a variety of default values ​​(depending on a number of factors such as Operating System, .), but at least 32767.

Declare the function rand () in C

Below is the declaration for rand () in C:

 int rand ( void ) 

Parameters

The rand function does not take any parameters

Returns the value

This function returns a random number in the range from 0 to RAND_MAX

For example

The following C program illustrates the usage of rand () in C:

 #include #include #include int main () { int i , n ; time_t t ; n = 5 ; /* Khoi tao bo sinh so ngau nhien */ srand (( unsigned ) time (& t )); /* in 5 so ngau nhien trong day tu 0 toi 49 */ for ( i = 0 ; i < n ; i ++ ) { printf ( "%dn" , rand () % 50 ); } return ( 0 ); } 

Compiling and running the above C program will result:

The function rand () in C Picture 1

According to Tutorialspoint

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