Strings in Programming | Basics of Ring Programming language

Strings in Programming | Basics of Ring Programming language...
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this video suitable for a lot of programming languages including : #Go , #python ,C sharp and #java ...

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what is Ring Programming language:
The Ring is a practical general-purpose multi-paradigm language. The supported programming paradigms are imperative, procedural, object-oriented, declarative using nested structures, functional, meta programming and natural programming. The language is portable (MS-DOS, Windows, Linux, macOS, Android, WebAssembly, etc.) and can be used to create Console, GUI, Web, Games and Mobile applications. The language is designed to be simple, small and flexible.
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content:
00:00 introduction
00:08 How to define String Variable ?
00:16 How to print in Ring Programming Language?
00:26 How string concated .
00:39 How to access the string letters.
00:50 useful strings functions.
00:57 upper() function.
01:00 lower() function.
01:05 isUpper() function.
01:10 isLower() function.
01:18 Output.
01:33 substr() function...
01:40 using substr to replace strings.
01:45 find sub string using substr() function.
01:50 get sub string from position to the end of the string using substr() function.
01:57 output.
02:13 useful strings functions.
02:17 left() function.
02:22 right() function.
02:28 len() function.
02:32 Output.
02:39 useful strings functions.
02:45 startsWith() function.
03:09 endsWith() function.
03:25 Output.
03:39 convert number to string.
04:09 output.
04:10 end of video.