The C Standard Library consists of a set of sections of the ISO C standard which describe a collection of header files and library routines used to implement common operations, such as input/output and string handling, in the C programming language.
Important: C Standard Library is planned to be deprecated soon. It is recommended that you use the much more compliant or complete Open Environment Core (P.I.P.S.) libraries instead. For information about how to migrate to P.I.P.S., see Migrating from C Standard Library (ESTLIB) to P.I.P.S..