To create calculated fields and formulas, you must understand
the operators supported by Envision. This section discusses the basic
operators.

### + (addition)

This means addition when applied to numbers and concatenation
when applied to strings. When applied to dates, it can be used to add
a number of days to a date.

Example

7 + 3

'abc' + 'def' = 'abcdef'

#April 15, 2004# + 15 = #April 30, 2004#

### – (subtraction)

This means subtraction when applied to numbers and negation
if applied to an expression. When applied to dates, it can be used to
subtract a given number of days from a date. Hence it can also be used
to calculate the difference in days between two dates.

Example

7-3

-(7+3) = -10

#April 16, 2004# - 15 = #April 1, 2004#

#April 15, 2004# - #April 8, 2004# = 7

### * (multiplication)

This means numeric multiplication.

Example

5 * 4 = 20.

### / (division)

This means numeric division.

Example

20/4 = 5.