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 ecvt(3) -- convert a floating-point number to a string.
    The ecvt() function converts number to a null-terminated string of ndigits digits (where ndigits is reduced to an system-specific limit determined by the precision of a double), and returns a pointer ...
 encrypt(3) -- Encrypt 64 bits messages
    These functions encrypt and decrypt 64 bit messages. The setkey() function sets the key used by encrypt(). The key parameter used here is an array of bytes, having each byte the numerical value 1 or 0...
 eps(3) -- Encapsulated PostScript canvas item.
    The eps canvas item lets you place encapulated PostScript (EPS) on a canvas, controlling its size and placement. The EPS item is displayed either as a solid rectangle or a preview image. The preview i...
 erf(3) -- error function and complementary error function
    The erf() function returns the error function of x; defined as erf(x) = 2/sqrt(pi)* integral from 0 to x of exp(-t*t) dt The erfc() function returns the complementary error function of x, that is 1.0 ...
 errno(3) -- number of last error
    The integer errno is set by system calls (and some library functions) to indicate what went wrong. Its value is significant only when the call returned an error (usually -1), and a library function th...
 exec(3) -- execute a file
    The exec family of functions replaces the current process image with a new process image. The functions described in this manual page are front-ends for the function execve(2). (See the manual page fo...
 exit(3) -- cause normal program termination
    The exit() function causes normal program termination and the value of status is returned to the parent. All functions registered with atexit() and on_exit() are called in the reverse order of their r...
 exp(3) -- exponential, logarithmic and power functions
    The exp() function returns the value of e (the base of natural logarithms) raised to the power of x. The log() function returns the natural logarithm of x. The log10() function returns the base-10 log...
 expm1(3) -- exponential minus 1, logarithm of 1 plus argument
    expm1(x) returns a value equivalent to `exp (x) - 1'. It is computed in a way that is accurate even if the value of x is near zero--a case where `exp (x) - 1' would be inaccurate due to subtraction ...
 fabs(3) -- absolute value of floating-point number
    The fabs functions return the absolute value of the floating-point number x.
 fclose(3) -- close a stream
    The fclose function dissociates the named stream from its underlying file or set of functions. If the stream was being used for output, any buffered data is written first, using fflush(3).
 fcloseall(3) -- close all open streams
    The fcloseall function dissociates all open streams from its underlying file or set of functions. Any buffered output data is written first, using fflush(3). Note that the standard streams (stdin, std...
 fenv(3) -- C99 floating point rounding and exception handling
    These eleven functions were defined in C99, and describe the handling of floating point rounding and exceptions (overflow, zero-divide etc.). Exceptions    [Toc]    [Back] The DivideByZero exception o...
 ferror(3) -- check and reset stream status
    The function clearerr clears the end-of-file and error indicators for the stream pointed to by stream. The function feof tests the end-of-file indicator for the stream pointed to by stream, returning ...
 fflush(3) -- flush a stream
    The function fflush forces a write of all user-space buffered data for the given output or update stream via the stream's underlying write function. The open status of the stream is unaffected. If th...
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