MUMPS Operators

+ as a unary operator simply forces M to evaluate the expression following as numeric; as a binary operator it causes M to perform addition.

Examples of +:

Example 1

- as a unary operator causes M to negate the expression following; as a binary operator it causes M to perform subtraction.

Examples of -:

Example 1

* binary operator for multiplication.

Examples of *:

Example 1

** binary operator for exponentiation.

Examples of **:

Example 1

/ binary operator for fractional division.

Examples of /:

Example 1

\ binary operator for integer division.

Examples of \:

Example 1

Example 2

# binary operator for modulo, that is, causes M to produce the remainder from integer division of the first argument by the second.

Examples of #:

Example 1

& binary AND operator produces a true result only if both of the expressions are true.

Examples of &:

Example 1

! binary OR operator produces a true result if either of the expressions is true.

Examples of !:

Example 1

' unary NOT operator negates current truth-value.

Examples of ':

Example 1

Example 2

_ binary operator causes M to concatenate the second expression with the first expresion

Examples of _:

Example 1

= binary operator causes M to produce a TRUE if the expressions are equal.

Examples of =:

Example 1

[ binary operator causes M to produce a TRUE if the first expression contains the ordered sequence of characters in the second expression.

Examples of [:

Example 1

] binary operator causes M to produce a TRUE if the first expression lexically follows the second expression in the character encoding sequence, which by default is ASCII.

Examples of ]:

Example 1

]] binary operator causes M to produce a TRUE if the first expression lexically sorts after the second expression in the subscript collation sequence.

Examples of ]]:

Example 1

The equal sign (=) between two numeric values tests for numeric equality.

Examples of =:

Example 1

> binary arithmetic greater than.

Examples of >:

Example 1

< binary arithmetic less than.

Examples of <:

Example 1

'= not equal

Examples of '=:

Example 1

<= less than or equal to, that is, not greater than.

Examples of '>:

Example 1

'< greater than or equal to, that is, not less than.

Examples of '<:

Example 1

alphabetic characters upper or lower case.

Examples of alphabetic:

Example 1

control characters ASCII 0-31 and 127.

Examples of control:

Example 1

any character; used to pass all characters in portions of the string where the pattern is not restricted.

Examples of any:

Example 1

lower-case alphabetic characters, ASCII 97-122.

Examples of lower-case:

Example 1

Example 2

digits 0-9, ASCII 48-57.

Examples of Numbers:

Example 1

punctuation, ASCII 32-47, 58-64, 91-96, 123-126.

Examples of punctuation:

Example 1

Example 2

upper-case alphabetic characters, ASCII 65-90.

Examples of upper-case:

Example 1

The repetition count consists of either a single integer literal or a period

The format for the . is:

Examples of .:

Example 1

Example 2