Definition
A static invariant is a property of a program that can be determined without executing the code, only by analyzing its syntactic and semantic structure. Static invariants are guaranteed to hold for all executions of the program and do not depend on empirical observation, as dynamic invariants do
Examples
def multiply_by_two(x):
return 2 * x- without executing this function, we can assume that the return value of it will always be an even number
for i in range(10):
assert i < 10 # Invariante statico: i non supera mai 9
- i will never be > than 10