Руководство пользователя для GNU Awk

Приложение A. Обзор gawk

A.5.2 Управляющие операторы

if (condition) statement [ else statement ]

while (condition) statement do statement while (condition)

for (expr1; expr2; expr3) statement

for (var in array) statement

break

continue

delete array[index]

delete array

exit [ expression ] - statements ""