what is scanner and why add this before the code ?
and its syntax explaination
Actual use of scanner in the code
Scanner is a class in java.util package used for obtaining the input of the primitive types like int, double, etc. and strings. It is the easiest way to read input in a Java program, though not very efficient if you want an input method for scenarios where time is a constraint like in competitive programming.
After importing, we need to write the following statement in our program.
Scanner s = new Scanner (System.in);
Here by writing Scanner s, we are declaring s as an object of Scanner class. System.in within the round brackets tells Java that this will be System Input i.e. input will be given to the system.
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