Narrowing Type Conversion: Why is assignment of int to a byte in a declaration allowed?

Question

This may sound too trivial for an intermediate Java programmer. But during my process of reviewing Java fundamentals, found a question:

Why is narrowing conversion l

Answer 1

Conversion from a number with a smaller range of magnitude ( like int to long or long to float ) is called widening. The goal of widening conversions is to produce no change in the magnitude of the number while preserving as much of the precision as possible. For example, converting the int 2147483647 to float produces 2.14748365e9 or 2,147,483,650. The difference is usually small, but it may be significant.

Conversely, conversion where there is the possibility of losing information about the magnitude of the number ( like long to int or double to long ) is called narrowing. With narrowing conversions, some information may be lost, but the nearest representation is found whenever possible. For example, converting the float 3.0e19 to long yields -9223372036854775807, a very different number.