atof(3) Library Functions Manual atof(3) atof - double LIBRARY Standard C library (libc, -lc) #include double atof(const char *nptr); atof() , nptr, double. strtod(nptr, NULL); atof() . . attributes(7). +----------------------------+----------------------------------------------------------+--------------------------+ | | | | +----------------------------+----------------------------------------------------------+--------------------------+ |atof() | | MT-Safe locale | +----------------------------+----------------------------------------------------------+--------------------------+ C11, POSIX.1-2008. POSIX.1-2001, C89, C99, SVr4, 4.3BSD. . atoi(3), atol(3), strfromd(3), strtod(3), strtol(3), strtoul(3) Dmitry Bolkhovskikh Yuri Kozlov ; GNU 3 , . . , , . Linux man-pages 6.06 31 2023 . atof(3)