=====================================
simple literal
=====================================

1234567890.1234567890
-1234567890.1234567890
-1_234_567_890.123_456_789_0

---

(source
  (float)
  (unary_operator
    (float))
  (unary_operator
    (float)))

=====================================
scientific notation
=====================================

1.0e6
1.0e+6
1.0e-6
-1.0e6
-1.0e+6
-1.0e-6
1.0E6
1.0E+6
1.0E-6
1_234_567_890.123_456_789_0e1_234_567_890

---

(source
  (float)
  (float)
  (float)
  (unary_operator
    (float))
  (unary_operator
    (float))
  (unary_operator
    (float))
  (float)
  (float)
  (float)
  (float))