import Foundation
/// Removes all non-numeric characters from a string, returning a new string
/// containing only numeric digits (0-9).
///
/// - Parameter input: The source string containing alphanumeric and special characters.
/// - Returns: A new String containing only digits.
func removeNonNumeric(_ input: String) -> String {
// Filter the characters, retaining only those within the standard ASCII digit range
return String(input.filter { ("0"..."9").contains($0) })
}
// --- Example Usage ---
let text = "123XYZ +9982-programming 10000000000001language"
// Process the string
let cleanedText = removeNonNumeric(text)
// Output results
print("Original: \(text)")
print("Cleaned: \(cleanedText)")
/*
run:
Original: 123XYZ +9982-programming 10000000000001language
Cleaned: 123998210000000000001
*/
