Grokking the Coding Interview: Patterns for Coding Questions
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for loop

sweetykumari

Jul 29, 2023

I didn't understand both for loop:

//why we are xor nums.Length+1?

//why we are xor nums.Length+1?

int x1 = 1;     for (int i = 2; i <= n; i++)       x1 = x1 ^ i;

////why we are xor nums.Length; isnt it should be nums.Length-1?     // x2 represents XOR of all values in arr     int x2 = arr[0];     for (int i = 1; i < n-1; i++)       x2 = x2 ^ arr[i];

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Shubham Vora
Shubham Voraa year ago

Certainly! Here's a brief explanation of each loop:

Loop 1: XOR from 1 to ( n )

int x1 = 1; for (int i = 2; i <= n; i++) x1 = x1 ^ i;
  • Purpose: This loop computes the XOR of all numbers from 1 to ( n ), where ( n ) is the length of ...

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