Prime Checker - Eiffel Typing CST Test
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Prime Checker — Eiffel Code
Checks if a number is prime.
class
PRIME_CHECKER
feature
is_prime (n: INTEGER): BOOLEAN
local i: INTEGER
do
from i := 2 until i >= n loop
if n \ i = 0 then
Result := False
return
end
i := i + 1
end
Result := True
end
end
! Run
local
p: PRIME_CHECKER
num: INTEGER
do
num := 13
create p
if p.is_prime(num) then
io.put_string ("Prime"); io.put_new_line
else
io.put_string ("Not Prime"); io.put_new_line
end
endEiffel Language Guide
Eiffel is a high-level, object-oriented programming language designed for software engineering with a strong emphasis on correctness, reusability, and maintainability. It supports the Design by Contract methodology, promoting robust and reliable applications.
Primary Use Cases
- ▸High-reliability enterprise software
- ▸Safety-critical systems
- ▸Reusable component libraries
- ▸Formal software engineering projects
- ▸Educational use for software engineering principles
Notable Features
- ▸Design by Contract
- ▸Strong static typing
- ▸Generic classes and collections
- ▸Multiple inheritance with controlled resolution
- ▸Automatic memory management (garbage collection)
Origin & Creator
Eiffel was created by Bertrand Meyer in the late 1980s at ETH Zurich and later developed further at Interactive Software Engineering.
Industrial Note
Eiffel is used in safety-critical systems, mission-critical enterprise applications, embedded systems requiring high reliability, and software frameworks emphasizing correctness.