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Ouestion 1 (15 pts) Write a lisp function triangle that takes an argument (n) and shows a triangle of printed numbers as shown in the following samples. If the input is decimal or string, it should print an appropriate message (triangle 4) (triangle 5) 1 2 1 2 3 1 2 3 4 1 2 1 2 3 1 2 3 4 1 2 3 4 5 (triangle 2.5), decinal numbers are not valid input, please enter an integer

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Answer #1

`Hey,

Note: Brother in case of any queries, just comment in box I would be very happy to assist all your queries

(defun triangle(n)
(if (typep n 'integer)
(loop for i from 1 to n
do (loop for j from 1 to i
do (write j)
(princ " ")
)
(write-line "")
(write-line "")
)
(write-line "Decimal numbers are not valid input, Please enter an integer"))
)
(triangle 5)

(defun triangle(n) (if (typep n integer) |(loop for i from 1 to n do (loop for j from 1 to i do (write j) (princ ) ) (writ

Output:

1 2 1 2 3 1 2 3 4 1 2 3 4 5

Kindly revert for any queries

Thanks.

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