add UpperCaseConversion method

Author: suryapratapsinghsuryavanshi

Conversions/UpperCaseConversion.js

@@ -0,0 +1,35 @@
+/*
+ Explanation :- a user gives a String (it can be incomplete lower or
+ partial lower) and then the program would convert it into a
+ complete(all characters in upper case) upper case string. The
+ logic we have used in the following program is: All the lower case
+ characters (a-z) has ASCII value ranging from 97 to 122 and their
+ corresponding upper case characters (A-Z) have ASCII values 32
+ lesser than them. For example ‘a‘ has an ASCII value of 97
+ and ‘A‘ has an ASCII value of 65 (97 - 32). The same applies to other
+ characters.
+*/
+
+/**
+ * UpperCaseConversion takes any case-style string and converts it to the upper case-style string.
+ * @param {String} inputString any case style string
+ * @returns {String} upper case string
+ */
+const UpperCaseConversion = (inputString) => {
+ // Take a string and split it into characters.
+ const newString = inputString.split('').map(char => {
+ // Get a character code by the use charCodeAt method.
+ const presentCharCode = char.charCodeAt()
+ // If the character code lies between 97 to 122 it means they are in the lower case so convert it.
+ if (presentCharCode >= 97 && presentCharCode <= 122) {
+ // Convert the case by use of the above explanation.
+ return String.fromCharCode(presentCharCode - 32)
+ }
+ // Else return the characters without any modification.
+ return char
+ })
+ // After modification, with the help of the join method, join all the characters and return them.
+ return newString.join('')
+}
+
+module.exports = UpperCaseConversion