ProvideX V8.20 > Language Reference > A. Appendix

827

Assignment Operators

The following assignment operators are included in the general syntax of the

language:

+=

Add to. Can be used with numerics or strings:

Numeric example: A+=1 is the same as A=A+1.

String example: A$+="G" is the same as A$=A$+"G".

­=

Subtract from. Not valid for strings.

Numeric only: B-=A+1 is the same as B=B-(A+1).

*=

Multiply by. Can be used with numerics or strings.

Numeric example: B*=A+1 is the same as B=B*(A+1)

String example: A$*=5 is the same as A$=A$+A$+A$+A$+A$.

/=

Divide by. Not valid with strings.

Numeric only: B/=A+1 is the same as B=B/(A+1).

^=

Exponentiation. Raise to. Not valid with strings.

Numeric only: B^=A is the same as B=B^A.

|=

Modulus / remainder from division. Not valid with strings.

Numeric only: B|=A is the same as B=MOD(B,A)

LIKE Operator

Use the LIKE operator for string comparisons. The ProvideX default is to take the

string expression on the left and compare it to the string mask on the right. You can

apply all the regular expression rules of the MSK( ) Function, p.484; e.g.,

IF A$ LIKE mask THEN ..

is the same as ...

IF MSK(A$, mask)<> 0 THEN ..

This operator may be used in conditionsl structures, such as IF..THEN..ELSE,

REPEAT..UNTIL, and WHILE..WEND.

To make conversions from Thoroughbred easier, set the 'TL' parameter to ON. With the

'TL' parameter set, the LIKE operator emulates the Thoroughbred matching of

patterns. For more information, refer to the 'TL' System Parameter, p.686.

Apostrophe Operator

The apostrophe operator is used to assign, retrieve, list, and make dynamic changes

to a given control or object's properties. For full details on the syntax and use of the

apostrophe, refer to the Apostrophe Operator in the next section.