Type casting in Java is the process of converting one data type to another, analogous to fitting books into bags of different sizes, with automatic conversions being safe and manual ones potentially leading to data loss.
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[Music]
Welcome back to CodeChef. Imagine you
have different bags for your school
books. A bigger bag can easily carry a
smaller book, but trying to squeeze a
big book into a tiny bag will cut off
part of it. That's exactly what happens
in Java when we move values between
different data types. It's called type
casting. Think of type casting like bags
and books. A small book always fits into
a bigger bag, safe and automatic. But a
large book doesn't fit into a smaller
bag unless you trim its pages, and that
means losing part of it. Java works the
same way. Sometimes conversions are
automatic, and sometimes you need to do
them manually. In Java, type casting
means converting one data type into
another. There are two types. Implicit
casting where Java automatically
converts smaller to larger types like
int to double and explicit casting where
you manually convert larger to smaller
types like double to int using parenthesis.
parenthesis.
Here's a quick example. int num equals
10. Double result equals num. That's
implicit casting. Then double pi= 3.14.
int whole equals in parenthesis int pi.
That's explicit casting. In the first
case, Java safely converts 10 into 10.0.
In the second case, 3.14 becomes three
and the decimal part is cut off. A few
quick tips. Implicit casting always goes
from smaller to larger types. Bite to
Explicit casting is required when going
backward. And remember, explicit casting
can cause data loss, just like trimming
a book to fit into a smaller bag. Now
it's your turn. Try the beginnerfriendly
code chef problem called type casting
basics. Practice converting between
integer, double, and character to
strengthen your understanding.
Today you learned that type casting
converts one type into another. Implicit
casting is automatic and safe. Explicit
casting requires parentheses and may
lose data. [Music]
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