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Write a function that returns 2 for input 1 and returns 1 for 2

  • Difficulty Level : Easy
  • Last Updated : 11 Nov, 2021

Write a function which returns 1 that 2 is passed and return 2 when 1 is passed.
Source: Adobe Interview Experience | Set 19 (For MTS)
A simple solution is to compare the passed value with 1 and 2.
 

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C




int invert(int x)
{
   if (x == 1) return 2;
   else return 1;
}

Java




static int invert(int x)
{
   if (x == 1) return 2;
   else return 1;
}
 
// This code is contributed by rishavmahato348.

Python3




def invert(x):
   if (x == 1):
      return 2
    else:
      return 1
 
    # This code is contributed by rishavmahato348.

C#




static int invert(int x)
{
    if (x == 1)
        return 2;
    else
        return 1;
}
 
// This code is contributed by rishavmahato348.

Javascript




function invert(x)
{
   if (x === 1)
           return 2;
   else
           return 1;
}
 
// This code is contributed by subham348.

Another solution is to use subtraction
 

C




int invertSub(int x)
{
   return (3-x);
}

Java




static int invertSub(int x)
{
   return (3-x);
}
 
// This code is contributed by shivanisinghss2110

Python3




def invertSub(x):
 
   return (3-x)
 
# this code is contributed by shivanisinghss2110

C#




static int invertSub(int x)
{
   return (3-x);
}
 
// This code is contributed by subham348.

Javascript




function invertSub(int x)
{
   return (3-x);
}
 
// This code is contributed by shivanisinghss2110

We can also use bitwise xor operator.
 

C




int invertXOR(int x)
{
   return (x ^ 1 ^ 2);
}

This article is contributed by Anuj. Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above
 




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