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Top Forums UNIX for Dummies Questions & Answers awk if statement / equals operator Post 302745331 by Golpette on Monday 17th of December 2012 06:33:39 AM
Old 12-17-2012
awk if statement / equals operator

Hi,
I was hoping someone could explain this please Smilie

I'm using bash, scientific linux... and I don't know what else you need to know. With

Code:
awk '{ if( 0.3 == 0.1*3) print $1}' file.dat

nothing will be printed since apparently the two numbers do not equate. (Using 0.3 != 0.1*3 is seen as true however)

0.2==0.1*2 is seen as true
0.5==0.1*5 is true
0.7==0.1*7 is false...

Many thanks
 

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IS_STRING(3)								 1							      IS_STRING(3)

is_string - Find whether the type of a variable is string

SYNOPSIS
bool is_string (mixed $var) DESCRIPTION
Finds whether the type given variable is string. PARAMETERS
o $var - The variable being evaluated. RETURN VALUES
Returns TRUE if $var is of type string, FALSE otherwise. EXAMPLES
Example #1 is_string(3) example <?php $values = array(false, true, null, 'abc', '23', 23, '23.5', 23.5, '', ' ', '0', 0); foreach ($values as $value) { echo "is_string("; var_export($value); echo ") = "; echo var_dump(is_string($value)); } ?> The above example will output: is_string(false) = bool(false) is_string(true) = bool(false) is_string(NULL) = bool(false) is_string('abc') = bool(true) is_string('23') = bool(true) is_string(23) = bool(false) is_string('23.5') = bool(true) is_string(23.5) = bool(false) is_string('') = bool(true) is_string(' ') = bool(true) is_string('0') = bool(true) is_string(0) = bool(false) SEE ALSO
is_float(3), is_int(3), is_bool(3), is_object(3), is_array(3). PHP Documentation Group IS_STRING(3)
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