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Top Forums Shell Programming and Scripting need help converting string to number for calculation Post 302114129 by tpatput on Thursday 12th of April 2007 05:25:15 PM
Old 04-12-2007
need help converting string to number for calculation

I've searched the forum and google, but can't see an answer to this simple problem. Here's my small test script:
Code:
#!/bin/csh
echo "enter a number:"
read num
echo "you entered $num"
set num = `expr $num + 1`
echo new value is $num

can someone show me how to do this calculation? note that in the real life script I'm working on, variables will be input, so something like
Code:
set num = 1

won't work for me

here's an example of the execution
Quote:
sh ./test.sh
enter a number:
12
you entered 12
new value is 12
Thanks in advance for your time and help.
Tom
 

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NUMFMT_PARSE(3) 							 1							   NUMFMT_PARSE(3)

NumberFormatter::parse - Parse a number

	Object oriented style

SYNOPSIS
public mixed NumberFormatter::parse (string $value, [int $type], [int &$position]) DESCRIPTION
Procedural style mixed numfmt_parse (NumberFormatter $fmt, string $value, [int $type], [int &$position]) Parse a string into a number using the current formatter rules. PARAMETERS
o $fmt -NumberFormatter object. o $type - The formatting type to use. By default, NumberFormatter::TYPE_DOUBLE is used. o $position - Offset in the string at which to begin parsing. On return, this value will hold the offset at which parsing ended. RETURN VALUES
The value of the parsed number or FALSE on error. EXAMPLES
Example #1 numfmt_parse(3) example <?php $fmt = numfmt_create( 'de_DE', NumberFormatter::DECIMAL ); $num = "1.234.567,891"; echo numfmt_parse($fmt, $num)." "; echo numfmt_parse($fmt, $num, NumberFormatter::TYPE_INT32)." "; ?> Example #2 OO example <?php $fmt = new NumberFormatter( 'de_DE', NumberFormatter::DECIMAL ); $num = "1.234.567,891"; echo $fmt->parse($num)." "; echo $fmt->parse($num, NumberFormatter::TYPE_INT32)." "; ?> The above example will output: 1234567.891 1234567 SEE ALSO
numfmt_get_error_code(3), numfmt_format(3), numfmt_parse_currency(3). PHP Documentation Group NUMFMT_PARSE(3)
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