In this article, we will discuss cond construct in LISP. The cond is a decision-making statement used to make n number of test conditions. It will check all the conditions.
Syntax:
(cond (condition1 statements)
(condition2 statements)
(condition3 statements)
...
(conditionn statements)
)
Here,
- The conditions specify different conditions – if condition1 is not satisfied, then it goes for next condition IE condition until the last condition.
- The statements specify the work done based on the condition.
Note: It will execute only one statement.
Example 1: LISP program to check whether a number is greater than 200 or not
Lisp
;set value1 to 500
(setq val1 500 )
;check whether the val1 is greater than 200
( cond ((> val1 200 )
( format t "Greater than 200" ))
( t ( format t "Less than 200" )))
|
Output:
Greater than 200
Example 2: Demo with comparison operators
Lisp
;set value1 to 500
(setq val1 500 )
;check whether the val1 is greater than 200
( cond ((> val1 200 )
( format t "Greater than 200" ))
( t ( format t "Not" )))
(terpri)
;check whether the val1 is equal to 500
( cond (( = val1 500 )
( format t "equal to 500" ))
( t ( format t "Not" )))
(terpri)
;check whether the val1 is equal to 600
( cond (( = val1 600 )
( format t "equal to 500" ))
( t ( format t "Not" )))
(terpri)
;check whether the val1 is greater than or equal to 400
( cond ((> = val1 400 )
( format t "greater than or equal to 400" ))
( t ( format t "Not" )))
(terpri)
;check whether the val1 is less than or equal to 600
( cond ((< = val1 600 )
( format t "less than or equal to 600" ))
( t ( format t "Not" )))
|
Output:
Greater than 200
equal to 500
Not
greater than or equal to 400
less than or equal to 600
Last Updated :
09 Nov, 2021
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