Are singleline if statements or if statements without braces bad practice?

Question

if (condition) { /* do something */ }
else { /* do something */ }

if (condition)
    /* do something */
else
    /* do something */

I was told tha

Answer 1

Those are two lines long, so not really a single line.

There's nothing wrong with single line ifs when it makes the code easier to read.

For example, something like this:

if (last_item) print ", and " else print ", "

is much better than

if (last_iem)
{
    print ", and "
}
else
{
    print ", "
}