... Turn off the expansion of variables, the significance of mathematical operators such as / or : , and the recognition of keywords. For example, after DEFINE rhl Patricia , /data/$rhl would be interpreted as four tokens ( / , data , / , and Patricia ), while "/data/$rhl" is only one ( /data/$rhl ). ... In fact, braces even turn off the expansion of $!var , to expand a variable within braces you need to say $!!var but you only very seldom need this. ... Hello')" World> . ...