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Write a C# Sharp program to convert the last 3 characters of a given string in upper case. If the length of the string has less than 3 then uppercase all the characters
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PHP String to Uppercase, Lowercase and First Letter Uppercase
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PHP Working With Strings Tutorial - The EECS Blog
Bash Shell Convert Uppercase to Lowercase in Linux - nixCraft
PHP Exercises: Convert the last 3 characters of a given string in upper case - w3resource
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The Top 9 Most Popular PHP String Functions – vegibit
