1.\" Copyright (c) 1990, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" the American National Standards Committee X3, on Information 6.\" Processing Systems. 7.\" 8.\" %sccs.include.redist.man% 9.\" 10.\" @(#)atoi.3 8.1 (Berkeley) 06/04/93 11.\" 12.Dd 13.Dt ATOI 3 14.Os 15.Sh NAME 16.Nm atoi 17.Nd convert 18.Tn ASCII 19string to integer 20.Sh SYNOPSIS 21.Fd #include <stdlib.h> 22.Ft int 23.Fn atoi "const char *nptr" 24.Sh DESCRIPTION 25The 26.Fn atoi 27function converts the initial portion of the string pointed to by 28.Em nptr 29to 30.Em integer 31representation. 32.Pp 33It is equivalent to: 34.Bd -literal -offset indent 35(int)strtol(nptr, (char **)NULL, 10); 36.Ed 37.Sh SEE ALSO 38.Xr atof 3 , 39.Xr atol 3 , 40.Xr strtod 3 , 41.Xr strtol 3 , 42.Xr strtoul 3 43.Sh STANDARDS 44The 45.Fn atoi 46function conforms to 47.St -ansiC . 48