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Top Forums Shell Programming and Scripting How to convert a 2 digit to 4 digit Post 302188264 by era on Wednesday 23rd of April 2008 04:22:14 AM
Old 04-23-2008
If you have printf, that's the ticket.

Code:
vnix$ printf '%04i\n' 24
0024

If you don't have it in the shell, try awk.

Code:
echo 24 | awk '{ printf "%04i\n", $0 }'


Last edited by era; 04-23-2008 at 05:23 AM.. Reason: awk as fallback
 

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ecvt(3C)																  ecvt(3C)

NAME
ecvt(), fcvt(), gcvt() - convert floating-point number to string SYNOPSIS
Obsolescent Interfaces DESCRIPTION
Converts value to a null-terminated string of ndigit digits and returns a pointer to the string. The high-order digit is non-zero, unless the value is zero. The low-order digit is rounded. The position of the radix character relative to the beginning of the string is stored indirectly through decpt (negative means to the left of the returned digits). The radix character is not included in the returned string. If the sign of the result is negative, the word pointed to by sign is non-zero, otherwise it is zero. One of three non-digit characters strings could be returned if the converted value is out of range. A or is returned if the value is larger than the exponent can contain, and is negative, or positive, respectively. The third string is returned if the number is illegal, a zero divide for example. The result value is Not A Number (NAN) and would return a character. Identical to except that the correct digit has been rounded for printf (FORTRAN F-format) output of the number of digits specified by ndigit. Converts the value to a null-terminated string in the array pointed to by buf and returns buf. It produces ndigit significant digits in FORTRAN F-format if possible, or E-format otherwise. A minus sign, if required, and a radix character is included in the returned string. Trailing zeros are suppressed. The radix character is determined by the currently loaded NLS environment (see setlocale(3C)). If has not been called successfully, the default NLS environment, "C", is used (see lang(5)). The default environment specifies a period as the radix character. Obsolescent Interfaces and convert floating-point number to string. EXTERNAL INFLUENCES
Locale The category determines the value of the radix character within the current NLS environment. WARNINGS
The values returned by and point to an array whose content is overwritten by subsequent calls to these interfaces by the same thread. and are obsolescent interfaces supported only for compatibility with existing DCE applications. New multi-threaded applications should use and AUTHOR
and were developed by AT&T. was developed by AT&T and HP. SEE ALSO
setlocale(3C), printf(3S), lang(5), thread_safety(5), glossary(9). STANDARDS CONFORMANCE
ecvt(3C)
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