Given an array arr, of type int, along with two int variables i and j, write some code that swaps the values of arr[i] and arr[j]. declare any additional variables as necessary.

You'll need a helper variable for this, so depending on your programming language, the solution becomes:

int helper;

helper = arr[i];

arr[i] = arr[j];

arr[j] = helper;

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what is inputmismatchexception?