The Free On-line Dictionary of Computing (30 December 2018):

explicit type conversion
cast

    (Or "cast" in C and elsewhere).  A programming
   construct (syntax) to specify that an expression's value
   should be converted to a different type.

   For example, in C, to convert an integer (usually 32 bits)
   to a char (usually 8 bits) we might write:

   	int i = 42;
   	char *p = &buf;
   	*p = (char) i;

   The expression "(char)" (called a "cast") converts i's value
   to char type.  Casts (including this one) are often not
   strictly necessary, due to automatic coercions performed by
   the compiler, but can be used to make the conversion obvious
   and to avoid warning messages.

   (1999-09-19)