It consists of a floating-pointliteral or decimal integer followed by the lower-case letter I.
它有浮点表和十进制整数跟随小写的字母i。
2
The integer part, the optional decimal point and the optional fraction part form the significant part of the floatingliteral.
整数部分,可选的小数点,以及可选的小数部分组成浮点文字量的有效部分。
3
A floatingliteral consists of an integer part, a decimal point, a fraction part, ane or e, an optionally signed integer exponent, and an optional type suffix.