K&R style

Named after Kernighan & Ritchie, because the examples in K&R are formatted this way.

Also called kernel style because the Unix kernel is written in it, and the "One True Brace Style" (abbrev. 1TBS) by its partisans.

In C code, the body is typically indented by eight spaces (or one tab) per level, as shown here. Four spaces are occasionally seen in C, but in C++ and Java four tends to be the rule rather than the exception.

 

if ([cond]) {
    [body]
}

 

 

 

Allman style

Named for Eric Allman, a Berkeley hacker who wrote a lot of the BSD utilities in it (it is sometimes called BSD style).

Resembles normal indent style in Pascal and Algol. It is the only style other than K&R in widespread use among Java programmers.

Basic indent per level shown here is eight spaces, but four (or sometimes three) spaces are generally preferred by C++ and Java programmers.

 

if ([cond])
{
    [body]
}

 

 

 

Whitesmiths style

Popularized by the examples that came with Whitesmiths C, an early commercial C compiler.

Basic indent per level shown here is eight spaces, but four spaces are occasionally seen.

 

if ([cond])
    {
    [body]
    }

 

 

 

GNU style

Used throughout GNU EMACS and the Free Software Foundation code, and just about nowhere else.

Indents are always four spaces per level, with { and } halfway between the outer and inner indent levels.

 

if ([cond])
  {
    [body]
  }