C for beginners: The Decision Control Structure

Forms of if

The if statement can take any of the following forms:

if (condition)
  do this;

if (condition) {
  do this;
  and this;
}

if (condition)
  do this;
else
  do this;

if (condition) {
  do this;
  and this;
} else
  do this;

if (condition) {
  do this;
  and this;
} else {
  do this;
  and this;
}

if (condition)
  do this;
else {
  if (condition)
    do this;
  else {
    do this;
    and this;
  }
}

if (condition) {
  if (condition)
    do this;
  else {
    do this;
    and this;
  }
} else {
  do this;
}

Contents

The Decision Control Structure