Parentheses in mathematical expressions cc4m_logo_inline
IDSTAT-9
TitleUse parentheses to clarify precedence in mathematical expressions.
PriorityStrongly recommended
Severity level5
DescriptionUse parentheses to clarify the precedence of operands in expressions with multiple mathematical operators. No parentheses are required when only one type of mathematical operator is used. For example: d = a * b * c;.
RationaleBy clarifying the precedence of the operands in such expressions, readability is improved and unexpected behaviour is prevented.

Avoid:

d = a * b + c;
h = f / 2 * g;

Instead use:

d = (a * b) + c;
h = (f / 2) * g;