PYTHON is_numeric

is this article helpful?
|
Python replacement for PHP's is_numeric [ edit | history ] 
def is_numeric(var):
    try:
        float(var)
        return True
    except ValueError:
        return False

or 
string.isdigit() # decimal integers only! with strings containing "." or numbers like "1e100" or "0xFF" isdigit() returns false!


See is: http://www.php2python.com/wiki/function.is-int/

PHP is_numeric

PHP original manual for is_numeric [ show | php.net ]

is_numeric

(PHP 4, PHP 5)

is_numeric — Finds whether a variable is a number or a numeric string

Description

bool is_numeric ( mixed $var )

Finds whether the given variable is numeric. Numeric strings consist of optional sign, any number of digits, optional decimal part and optional exponential part. Thus +0123.45e6 is a valid numeric value. Hexadecimal notation (0xFF) is allowed too but only without sign, decimal and exponential part.

Parameters

var

The variable being evaluated.

Return Values

Returns TRUE if var is a number or a numeric string, FALSE otherwise.

Examples

Example #1 is_numeric() examples

<?php
$tests = Array(
        "42", 
        1337, 
        "1e4", 
        "not numeric", 
        Array(), 
        9.1
        );

foreach($tests as $element)
{
    if(is_numeric($element))
    {
        echo "'{$element}' is numeric", PHP_EOL;
    }
    else
    {
        echo "'{$element}' is NOT numeric", PHP_EOL;
    }
}
?>

See Also

  • ctype_digit() - Check for numeric character(s)
  • is_bool() - Finds out whether a variable is a boolean
  • is_null() - Finds whether a variable is NULL
  • is_float() - Finds whether the type of a variable is float
  • is_int() - Find whether the type of a variable is integer
  • is_string() - Find whether the type of a variable is string
  • is_object() - Finds whether a variable is an object
  • is_array() - Finds whether a variable is an array

Variable handling Functions
PHP Manual