June 4, 1993 ATOL 3

### NAME

atol - convert ASCII string to long integer

### LIBRARY

Standard C Library (libc, -lc)

### SYNOPSIS

```long` atol(```const char *nptr`)

### DESCRIPTION

The atol(``) function converts the initial portion of the string pointed to by nptr to long integer representation.

It is equivalent to:

  `

      strtol(nptr, (char **)NULL, 10);

  `

### SEE ALSO

atof(3), atoi(3), strtod(3), strtol(3), strtoul(3)

### STANDARDS

The atol(``) function conforms to ANSI X3.159-1989 (``ANSI C89'') .