Differences

This shows you the differences between two versions of the page.

@@ Line 1: / Line 1: @@
+# $EPIC: isdigit.txt,v 1.1.1.1 2006/07/11 04:57:43 jnelson Exp $
+======Synopsis:======
+$__isalpha__(<text>) \\
+$__isdigit__(<text>)
+======Technical:======
+These function test whether the first character in the given string is
+an alphabetical character or a digit.  Only the first character is
+tested.
+======Practical:======
+These functions are useful for testing an input string to see whether it
+is a number or a text string.  One use for this might be to check if it
+would be suitable input for $[[iptoname]]() or $[[nametoip]]().  Keep in mind
+that only the first character is tested, so this isn't a reliable way
+to see if the entire string is a number.
+======Returns:======
+"true" or "false" value if first character is a letter or a digit
+======Examples:======
+<file>
+$isalpha(hello)         returns true
+$isalpha(2hello)        returns false
+$isdigit(123)           returns true
+$isdigit(2abc)          returns true
+$isdigit(a123)          returns false
+</file>

EPIC