Not in Go. Number literals don't have a type until they're assigned to a variable or used in a place that implies a type (e.g. a function argument). For example, the following is valid:

  var u uint32 = 10000000000.0 / 100000

even though 10000000000 overflows uint32 and it's also written like a floating-point literal.

But underscores also work for numbers that don't have lot of zeros. Compare:

    12_345_678
    1.2345678e7