RIGHT$: Your String Tail-End Tamer
Need to grab the end of a word, phrase, or sentence? Want to extract the last few characters from a string? Look no further than the RIGHT$ command, your string tail-end tamer! This handy function lets you precisely slice off the rightmost part of a string, leaving you with just the characters you need. It's like having a tailor-made tool for trimming your text!
Syntax
RIGHT$(<string>, <length>)
Where:
- <string>: The string you want to extract characters from.
- <length>: The number of characters you want to keep, counting from the right end of the string.
Applications
The RIGHT$ function is your go-to tool when:
- Extracting file extensions: Isolate the ".txt", ".prg", or other extensions from filenames.
- Getting the last part of a word: Grab the suffix of a word, like "-ing" or "-ed".
- Formatting data: Extract the last few digits of a number, like a phone number extension.
- Validating input: Check if the end of a user's input matches a specific pattern.
Code Examples
1. Simple Character Extraction:
10 A$ = "Commodore 64"
20 B$ = RIGHT$(A$, 2) :rem B$ stores "64"
30 PRINT B$ :rem Output: 64
This example extracts the last two characters ("64") from the string "Commodore 64".
2. Extracting File Extension:
10 INPUT "ENTER A FILENAME: "; N$
20 F$=RIGHT$(N$,3) :REM EXTRACT THE EXTENSION
30 PRINT "FILE EXTENSION: "; F$
This snippet demonstrates how to use RIGHT$ in conjunction with INSTR and LEN to determine the file extension of a user-inputted filename.
RIGHT$ in the Wild: The Phone Number Formatter
Imagine you're writing a program to manage contact information. RIGHT$ could help you extract the last four digits of a phone number, which might be a useful way to display or organize the data.
Don't let your strings get too long-winded! With RIGHT$ in your toolbox, you can easily snip them down to size, extracting just the information you need from the right end. It's a simple yet powerful function that can streamline your string manipulations and make your Commodore 64 programs more efficient. So embrace the precision of RIGHT$ and become a master of string trimming!
