Awk Loops

awk 'BEGIN {
    for (x = 0; x <= 10; x++) {
        if (x == 5 || x == 6)
            continue
        printf "%d ", x
    }
    print ""
}'

awk 'BEGIN {
    break_num = 5
    for (i = 0; i < 10; i++) {
        print i
        if (i == break_num)
            break
    }
}'

awk 'BEGIN {
    while (a < 10) {
        print "- " " concatenation: " a
        a++;
    }
}'

#do…while

awk '{
    i = 1
    do {
        print $0
        i++
    } while (i <= 5)
}' /etc/passwd

awk 'BEGIN {
    assoc["key1"] = "val1"
    assoc["key2"] = "val2"
    for (key in assoc)
        print assoc[key];
}'

#Arguments

awk 'BEGIN {
 for (argnum in ARGV)
 print ARGV[argnum];
}' a b c

awk 'BEGIN {
    for (i = 0; i < 10; i++)
        print "i=" i;
}'

#Powers of two between 1 and 100

awk 'BEGIN {
 for (i = 1; i <= 100; i \*= 2)
 print i
}'