Including double ampersands (&&) in a string literal, for example, "AAA&&BBB", generates an error. Instead, to include double ampersands, use concatenation as shown: "AAA&" + "&" + "BBB".

When using concatenation, use caution with placement of a single ampersand (&), which is used to perform macro substitution and thus might produce undesirable results. For example, suppose you assign the string "YYY" to a variable, BBB. Performing concatenation using "AAA&" and "&BBB" replaces "BBB" with "YYY", so instead of getting the result "AAA&&BBB", the result is "AAA&YYY". For more information, see & Command.

In earlier versions of Visual FoxPro, you cannot place && and a comment after the semicolon that is used to continue a command line to an additional line.