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## gawk:Break Statement

```
7.4.6 The 'break' Statement
---------------------------

The 'break' statement jumps out of the innermost 'for', 'while', or 'do'
loop that encloses it.  The following example finds the smallest divisor
of any integer, and also identifies prime numbers:

# find smallest divisor of num
{
num = \$1
for (divisor = 2; divisor * divisor <= num; divisor++) {
if (num % divisor == 0)
break
}
if (num % divisor == 0)
printf "Smallest divisor of %d is %d\n", num, divisor
else
printf "%d is prime\n", num
}

When the remainder is zero in the first 'if' statement, 'awk'
immediately "breaks out" of the containing 'for' loop.  This means that
'awk' proceeds immediately to the statement following the loop and
continues processing.  (This is very different from the 'exit'
statement, which stops the entire 'awk' program.  ⇒Exit
Statement.)

The following program illustrates how the CONDITION of a 'for' or
'while' statement could be replaced with a 'break' inside an 'if':

# find smallest divisor of num
{
num = \$1
for (divisor = 2; ; divisor++) {
if (num % divisor == 0) {
printf "Smallest divisor of %d is %d\n", num, divisor
break
}
if (divisor * divisor > num) {
printf "%d is prime\n", num
break
}
}
}

The 'break' statement is also used to break out of the 'switch'
statement.  This is discussed in ⇒Switch Statement.

The 'break' statement has no meaning when used outside the body of a
loop or 'switch'.  However, although it was never documented, historical
implementations of 'awk' treated the 'break' statement outside of a loop
as if it were a 'next' statement (⇒Next Statement).  (d.c.)
Recent versions of BWK 'awk' no longer allow this usage, nor does
'gawk'.

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