Driver Code
public static void Main ( ) { int [ ] arr1 = { 4 , 8 , 1 , 3 , 7 } ; int [ ] arr2 = { 7 , 4 , 3 , 1 } ; int n = arr1 . Length ; Console . Write ( " Missing ▁ number ▁ = ▁ " + missingNumber ( arr1 , arr2 , n ) ) ; } }