Every language has its gotchas. Even assignment operators are kind of a gotcha.
If you're coming from a basic math background, and have no programming experience, then the expression "a = 15; a = a + 1;" would be confusing in any mutable language, because assigning a value to a variable is not equivalent to stating the equality (identity) of both sides.
If you're coming from a basic math background, and have no programming experience, then the expression "a = 15; a = a + 1;" would be confusing in any mutable language, because assigning a value to a variable is not equivalent to stating the equality (identity) of both sides.