1. //double equal to 1.0
1.0 //double
2432311.7567374 //double
1.234E-10 //double
1.234e-10 //double
758832d //double
728832f //float
1.0f //float
758832D //double
728832F //float
1.0F //float
1 / 2. //double
1 / 2 //int equal to 0
