= (equality)Equal--binary (Relational) ------------------------------------------------------------------------------Syntax<exp1> = <exp2>TypeCharacter, date, logical, memo, NIL, numericOperands<exp1>and<exp2>are expressions of the same data type to compare.DescriptionThe equal operator (= ) compares two values of the same data type and returns true (.T.) if <exp1> is equal to <exp2> according to the following rules:. Character:The comparison is based on the underlying ASCII code. ASCII codes for alphabetic characters are ascending (e.g., the code for "A" is 65 and the code for "Z" is 90). When EXACT is OFF, two character strings are compared according to the following rules. assume two character strings, cLeft and cRight, where the expression to test is (cLeft = cRight):-If cRight is null, returns true (.T.).-If LEN(cRight) is greater than LEN(cLeft), returns false (.F.).-Compare all characters in cRight with cLeft. If all characters in cRight equal cLeft, returns true (.T.); otherwise, returns false (.F.). With EXACT ON, two strings must match exactly except for trailing blanks.. Date:Dates are compared according to the underlying date value.. Logical:True (.T.) is equal to true (.T.) and false (.F.) equal to false (.F.).. Memo:Treated the same as character.. NIL:True (.T.) if compared to a NIL value; false (.F.) if compared to a value of any other data type.. Numeric:Compared based on magnitude.Examples.These examples illustrate how the equal operator (=) behaves with different data types: // Character SET EXACT ON ? "123" = "123 " // Result: .T. ? " 123" = "123" // Result: .F. SET EXACT OFF ? "123" = "12345" // Result: .F. ? "12345" = "123" // Result: .T. ? "123" = "" // Result: .T. ? "" = "123" // Result: .F. // Date ? CTOD("12/12/88") = ; CTOD("12/12/88") // Result: .T. // Logical ? .T. = .T. // Result: .T. ? .F. = .T. // Result: .F. // NIL ? NIL = NIL // Result: .T. ? NIL = 12 // Result: .F. ? NIL = CTOD("") // Result: .F. // Numeric ? 2 = 1 // Result: .F. ? 1 = 1 // Result: .T.

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