startsWith method in java

#1 
String str="hello";
	System.out.println(str.startsWith(""));

why it prints true as output?

#2

Hello Pankaj, this is because that’s how the API was designed, see the javadoc.

But more seriously, one analogy can be to look at sets. Let’s imagine a string is a set of characters, then the empty string is the empty set. In set theory, the empty set is always part of any set.

#3

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