$number0, 1.00, contains a period
$number0, 1.00, is an Integer		# --> Note 1
$number1, 1, is an Integer
$number2, 1.39393939393939, contains a period
$number3, 12345678912300, is an Integer
$number4, 0.00123, contains a period
        No period in 123e-5

Next, using ww's regex

$number0: 1.00
$number1: 1
$number2: 1.39393939393939
$number3: 12345678912300
$number4: 0.00123

$number0 contains a decimal point
Integer value, if desired: 1
$number1 contains a decimal point
Integer value of $number1, if desired: 1
$number2 contains a decimal point
Integer value of $number2, if desired: 1
$number3 contains a decimal point
Integer value of $number3, if desired: 12345678912300
$number4 contains a decimal point
Integer  value of $number4, if desired: 0
NO decimal point in $number5, 123e-5
Integer value of $number5, if desired: 0