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The logical value FALSE is represented with an integer zero value, while
the logical value TRUE is represented with any value differing from zero.
論理値の偽（FALSE）は整数のゼロで表されます。一方、論理値の真（TRUE）はどんな値でもゼロとは違う状態で表されます。
The value of expressions containing operations of relation or logical operations is 0 (FALSE) or 1 (TRUE).
関係の演算子や論理演算を含む式の値は 0 （FALSE）または 1 （TRUE）です。
True if a equals b a == b;
a と b が等しければ TRUE
True if a does not equal b a != b;
a と b が等しくなければ TRUE
True if a is less than b a < b;
a が b より小さければ TRUE
True if a is greater than b a > b;
a が b より大きければ TRUE
True if a is less than or equals b a <= b;
a が b 以下であれば TRUE
True if a is greater than or equals b a >= b;
a が b 以上であれば TRUE
Two unnormalized floating-point numbers cannot be linked by == or != operations.
That is why it is necessary to subtract one from another, and the normalized outcome needs to be compared to null.
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