chore(Go): add anagram (#834)

algorithms/Go/README.md

@@ -27,4 +27,5 @@
 
 ## String
 - [Palindrome Permutation](strings/palindrome-permutation.go)
+- [Anagram](strings/anagram.go)
 

algorithms/Go/strings/anagram.go

@@ -0,0 +1,55 @@
+package main
+
+/**
+Problem Statement: Given two strings s and t, find they are anagrams or not
+An Anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once.
+
+**/
+
+/***
+Example 1: Input: s="anagram" t="nagaram"
+		   Output: true
+
+Example 2: Input: s="rat" t="car"
+		   Output: false
+
+***/
+
+/***
+Time complexity: O(n), n=length of string s
+Space complexity: O(1)
+
+**/
+
+import "fmt"
+
+func main() {
+	fmt.Println("Enter first string")
+	var first string
+	fmt.Scanln(&first)
+	fmt.Println("Enter second string")
+	var second string
+	fmt.Scanln(&second)
+	ans := isAnagram(first, second)
+	if ans == true {
+		fmt.Println("They are anagrams")
+	} else {
+		fmt.Println("They are not anagrams")
+	}
+}
+func isAnagram(s string, t string) bool {
+	var count [256]int
+	//var i int
+	for i := 0; i < len(s); i++ {
+		count[s[i]]++
+	}
+	for i := 0; i < len(t); i++ {
+		count[t[i]]--
+	}
+	for i := 0; i < len(count); i++ {
+		if count[i] != 0 {
+			return false
+		}
+	}
+	return true
+}