0 starts with octal, 077,003 are all plastic; 087 is illegal, there is no 8 in octal number, and the maximum is 7;
E-4 is illegal, it should be 1E-4, floating-point type; 1 1E is illegal. E must be followed by a value, which can be positive or negative. Negative values belong to floating-point type, and positive values can be integers such as 32e3 1.
0.0 and 0.0 are both 0.0, floating-point type, of course. It is estimated that only the exam questions have this writing method, which is legal;
.32e31This thing is legal. I don't know how much it costs.