Replacing nested if statements

Question

This is related to a chapter from beautiful code. And in that chapter I read about the nested ifs.

The author was talking about deeply nested if

Answer 1

Nested if are equivalent to the logical operator AND

if (condition1)
{
    if (function(2))
    {
        if (condition3)
        {
            // do something
        }
    }
}

Equivalent code:

if (condition1 && function(2) && condition3)
{
    // do something
}

In both cases, when an expression evaluates false, the subsequent expression will not be evaluated. For example, if condition1 is false, the function() will not be called, and condition3 won't be evaluated.