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# \$addweeks

Calculates a date value by adding weeks to (or subtracting weeks from) a specified date value.

### Syntax

\$addweeks(date,number)

### Parameters

 date a date, or an expression that evaluates to a DATE data type number a number, or an expression that evaluates to a number

### Return Value

Number, representing a DATE value.

### Comments

Use \$addweeks to perform arithmetic with date values. The \$addweeks function calculates a date value by adding a number representing weeks to a date value. If number is negative, the effect is to subtract the weeks from the date.

The + (add) and – (subtract) operators can be used to achieve the same results.

If date or the result of the \$addweeks expression is an invalid date (e.g., 19930231), it is adjusted to produce a valid date (e.g., 19930228).

### Example

If \$Date has the value 19981225, then

\$addweeks(\$date,1)

Evaluates to 19990101.

\$addweeks(\$date,-2)

Evaluates to 1998.501.

\$addweeks(19980201,4)

Evaluates to 19980301.

See Also

\$adddays

\$addmonths

\$addyears

\$todate

\$weekday

+ (Add/Positive)

– (Subtract/Negative)

About Functional Expressions

Arithmetic with Dates

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