noun
constant expression
In computing, an expression whose value is fixed at compile time and does not change during program execution.
C言語では、配列のサイズに定数式を指定する必要がある。
In C, you must specify a constant expression for the size of an array.
この定数式はコンパイル時に評価される。
This constant expression is evaluated at compile time.
式 is a general term for expression or formula; 定数式 specifically refers to a constant expression in computing.
Compound of 定数 (constant) and 式 (expression), used as a technical term in computing.