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Check if Two Strings are Anagrams

Certification: Basic Level Accuracy: 77.78% Submissions: 9 Points: 10

Write a Python program that checks if two given strings are anagrams of each other. 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: string1 = "listen", string2 = "silent"
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  • Output: true
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  • Explanation:
    
      
      
    • Step 1: Count the frequency of each character in the first string.
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    • Step 2: Count the frequency of each character in the second string.
      • 
      
    • Step 3: Compare the character frequencies from both strings.
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    • Step 4: Return true since both strings have identical character frequencies.
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    •
Example 2
    
  
  • Input: string1 = "hello", string2 = "world"
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  • Output: false
    • 
  
  • Explanation:
    
      
      
    • Step 1: Count the frequency of each character in the first string.
      • 
      
    • Step 2: Count the frequency of each character in the second string.
      • 
      
    • Step 3: Compare the character frequencies from both strings.
      • 
      
    • Step 4: Return false since the character frequencies are different.
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Constraints
    
  
  • 1 ≤ len(string1), len(string2) ≤ 10^6
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  • Strings contain only lowercase English letters
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  • Time Complexity: O(n), where n is the length of the strings
    • 
  
  • Space Complexity: O(1)
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ArraysStringsCapgeminiLTIMindtree
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Hint
Solution

Solution Hints

    
  
  • Check if the lengths of the two strings are the same.
    • 
  
  • Use a frequency array or hash map to count the occurrences of each character in both strings.
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  • Compare the frequency arrays or hash maps to determine if the strings are anagrams.
    •

Steps to solve by this approach:

 Step 1: Define a function areAnagrams that takes two constant string references.
 Step 2: Check if the lengths of both strings are equal; if not, return false.
 Step 3: Create an array to count occurrences of each character (assuming lowercase letters only).
 Step 4: Increment counters for characters in the first string.
 Step 5: Decrement counters for characters in the second string.
 Step 6: Check if all counters are zero after processing both strings.
 Step 7: Return true if all counters are zero, false otherwise.

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