Add reverse_word_string.go to string_algorithms

Author: joaopedrocampos

Diff for: code/string_algorithms/src/reverse_word_string/reverse_word_string.go

@@ -0,0 +1,27 @@
+/// Part of Cosmos by OpenGenus Foundation
+/// Receives a string and returns the reverse of it
+/// Contributed by: Joao Pedro Campos Silva (joaopedrocampos)
+
+package main
+
+import (
+	"fmt"
+)
+
+// Function to reverse a string
+func reverseString(s string) string {
+	runes := []rune(s)
+
+	for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
+		runes[i], runes[j] = runes[j], runes[i]
+	}
+
+	return string(runes)
+}
+
+func main() {
+	fmt.Println(reverseString("I know what you did last summer")) // Output: remmus tsal did uoy tahw wonk I
+	fmt.Println(reverseString("OpenGenus cosmos"))                // Output: somsoc suneGnepO
+	fmt.Println(reverseString("GoLang"))                          // Output: gnaLoG
+	fmt.Println(reverseString("12345"))                           // Output: 54321
+}