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Top Forums UNIX for Beginners Questions & Answers What is the meaning the $ special character? Post 303006459 by bodisha on Thursday 2nd of November 2017 11:16:10 AM
Old 11-02-2017
What is the meaning the $ special character?

Hello... and thank you in advanced for any help anyone can offer me

I'm hoping someone can explain what the leading $ is/means (i.e. $PS1, $HOME, etc).... I was having a discussion with someone and was trying to explain it... Which I felt like I came up kind of short with how well I did it.

I understand it's a special character and how to use it if I want to see the value of a variable or if I want to see the status of a command... I'm just unsure what kind of special character its categorized as or the definition of it's exact function.

I got home and googled it... I found plenty of explanations on how to use it but didn't find an adequate explanation of what it is and it's definition. It seems like every special character is well documented except the $... Could someone explain to me how it's categorized and it's extract definition?

Once again... thanks for reading this and any help anyone can offer
 

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PX_TIMESTAMP2STRING(3)					     Library Functions Manual					    PX_TIMESTAMP2STRING(3)

NAME
PX_timestamp2string -- Convert paradox timestamp into formated string SYNOPSIS
#include <paradox.h> char * PX_timestamp2string(pxdoc_t *pxdoc, double timestamp, const char *format) DESCRIPTION
Creates a string representation of a paradox timestamp as specified in the parameter format. The timestamp must be either retrieved with PX_get_data_double(3) after calling PX_get_record(3) or by simply using the double value in the pxval_t struct as returned by PX_retrieve_record(3). A timestamp contains both time and date information. The format string contains chars which stand for certain values of the date/time. The following table lists all available characters with a meaning. All other characters are being copied unmodified to the output string. If a special character shall not be interpreted it must be preceded with a backslash. Characters and their meaning in date/time format string Character Meaning Y year, numeric, 4 digits y year, numeric, 2 digits m month, numeric n month, numeric, no leading zeroes d day of the month, numeric j T{ day of the month, numeric, no leading zeros T} H hour, numeric, 24 hour format h hour, numeric, 12 hour format G T{ hour, numeric, 24 hour format, no leading zeroes T} g T{ hour, numeric, 12 hour format, no leading zeroes T} i minutes, numeric s seconds, numeric A AM/PM a am/pm L boolean for leap year RETURN VALUE
Returns pointer to string on success and NULL on failure. SEE ALSO
PX_time2string(3), PX_date2string(3) AUTHOR
This manual page was written by Uwe Steinmann uwe@steinmann.cx. PX_TIMESTAMP2STRING(3)
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