Awk Conditions

awk -F: '{
    switch (NR * 2 + 1) {
        case 3:
        case "11":
            print NR - 1
            break

        case /2[[:digit:]]+/:
            print NR

        default:
            print NR + 1

        case -1:
            print NR * -1
    }
}' /etc/passwd

awk 'BEGIN {
    assoc["foo"] = "bar";
    assoc["bar"] = "baz";
    if ("foo" in assoc)
        print "Fooey!";
}'

#Not exists

awk 'BEGIN {
    assoc["foo"] = "bar";
    assoc["bar"] = "baz";
    if ("Huh" in assoc == 0 )
        print "Huh!";
}'

awk -v count=2 'BEGIN {
    if (count == 1)
        print "Yes";
    else
        print "Huh?";
}'

#Ternary operator

awk -v count=2 'BEGIN {
    print (count==1) ? "Yes" : "Huh?";
}'