“else if()” versus multiple “if()”s in C#

Question

How do these practically differ?

// Approach one
if (x == 1)
    DoSomething();
else if (x == 2)
    DoSomethingElse();

// Approach two
if (x == 1)
    DoSo         


        

Answer 1

When you code like this

// approach two
if (x == 1)
    DoSomething();
if (x == 2)
    DoSomethingElse();

Everytime the condition checks.

But when you code like this

if (x == 1)
    DoSomething();
else if (x == 2)
    DoSomethingElse();

If the first condition is true then it wont check next else if condition and thus decrease unnecessary compiling.