Java

The main() method of Java consists of the code to be executed by the declared class. It is considered the most fundamental aspect of Java programming.

while loop in Java checks the condition at the start of the loop and executes the loop for a true condition. If the loop condition is false, it won’t execute.

To read a file in Java there are methods like the Scanner class, BufferedReader class, and FileReader, the files can also be read using List and as a string

The string charAt() method in Java returns the character according to the specified index. This method also fetches the first and last elements of the String

The Stack is implemented using the Stack class in Java. The Stack class implements certain operations like push(), pop(), peek(), search(), and empty()

Declare an object with the type of the data either Integer or String. After that, use the iterator, forEach, or Listiterator method to iterate over the Stack.

The string contains() method of Java searches for a sequence of characters from the declared string are retrieves a Boolean true or false.

The for-each loop in Java is implemented in such a manner that it iterates over the elements in an iterable without using the index number.