Sometimes you might want to check the digits of an integer, i.e. to validate user input. Here is a really simple way using regular expressions:
# check the number of digits in an integer $integer = 5721567 # is it between 4 and 6 digits? $is4to6 = $integer -match '^\d{4,6}$' # is it exactly 7 digits? $is7 = $integer -match '^\d{7}$' # is it at least 4 digits? $isatleast4 = $integer -match '^\d{4,}$' "4-6 digits? $is4to6" "exactly 7 digits? $is7" "at least 4 digits? $isatleast4"
The examples show how you check for exact matches, or ranges. Note that “^” denotes the beginning and “$” denotes the end of an expression. “\d” represents a digit, and the brace determines how many are allowed.
