int8,16,32,64 とか範囲忘れるのでメモ
| 型 | 出力範囲 |
|---|---|
| int8 | -128 ～ 127 |
| int16 | -32,768 ～ 32,767 |
| int32 | -2,147,483,648 ～ 2,147,483,647 |
| int64 | -9,223,372,036,854,775,808 ～ 9,223,372,036,854,775,807 |
| uint8 | 0 ～ 255 |
| uint16 | 0 ～ 65,535 |
| uint32 | 0 ～ 4,294,967,295 |
| uint64 | 0 ～ 18,446,744,073,709, 551,615 |
