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Full Discussion: Test decimal number
Top Forums Shell Programming and Scripting Test decimal number Post 302339673 by jim mcnamara on Friday 31st of July 2009 06:31:39 AM
Old 07-31-2009
one way
Code:
isdec()
{
    echo "$1" | tr -dc '[:digit:]'  | read  value
    if [[ $(( ${#1} - ${value} )) -eq 1 ]] ; then   # all numbers except one character
          [[ echo "$1" | grep -q '\.' ]] && echo 'ok' || echo 'not ok'  # one char is .
    fi
}
var=zz3
isdec $var
var=1.234
isdec $var

 

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BOOLVAL(3)								 1								BOOLVAL(3)

boolval - Get the boolean value of a variable

SYNOPSIS
boolean boolval (mixed $var) DESCRIPTION
Returns the boolean value of $var. PARAMETERS
o $var - The scalar value being converted to a boolean. RETURN VALUES
The boolean value of $var. EXAMPLES
Example #1 boolval(3) examples <?php echo '0: '.(boolval(0) ? 'true' : 'false')." "; echo '42: '.(boolval(42) ? 'true' : 'false')." "; echo '0.0: '.(boolval(0.0) ? 'true' : 'false')." "; echo '4.2: '.(boolval(4.2) ? 'true' : 'false')." "; echo '"": '.(boolval("") ? 'true' : 'false')." "; echo '"string": '.(boolval("string") ? 'true' : 'false')." "; echo '"0": '.(boolval("0") ? 'true' : 'false')." "; echo '"1": '.(boolval("1") ? 'true' : 'false')." "; echo '[1, 2]: '.(boolval([1, 2]) ? 'true' : 'false')." "; echo '[]: '.(boolval([]) ? 'true' : 'false')." "; echo 'stdClass: '.(boolval(new stdClass) ? 'true' : 'false')." "; ?> The above example will output: 0: false 42: true 0.0: false 4.2: true "": false "string": true "0": false "1": true [1, 2]: true []: false stdClass: true SEE ALSO
floatval(3), intval(3), strval(3), settype(3), is_bool(3), Type juggling. PHP Documentation Group BOOLVAL(3)
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