n%10 gives you the least significant digit of n by calculating the remainder of dividing the number by 10. Hence, the method returns the sum of the least significant digit and the sum of digits of n/10 (which is the number that contains all the digits of n except of the least significant digit).

What does /* mean in Java?

/** and /* in Java comments

All characters available inside any comment are ignored by Java compiler. /** is known as documentation comments. It is used by Javadoc tool while creating the documentation for the program code. /* is used for multi-line comments.

What does ** mean in Java?

* (Multiplication) Multiplies values on either side of the operator. A * B will give 200. / (Division) Divides left-hand operand by right-hand operand.

What does semicolon mean in Java?

Java uses Semicolon similar to C. Semicolon is a part of syntax in Java. It shows the compiler where an instruction ends and where the next instruction begins. Semicolon allows the java program to be written in one line or multiple lines, by letting the compiler know where to end the instructions.

What is operand in Java?

The symbol used in an operation is called an operator. A value involved in an operation is called an operand. A unary operator is an operator that performs its operation on only one operand. An operator is referred to as binary if it operates on two operands.

Can you use += in Java?

Let’s understand the += operator in Java and learn to use it for our day to day programming. x += y in Java is the same as x = x + y. It is a compound assignment operator. Most commonly used for incrementing the value of a variable since x++ only increments the value by one.

What is a colon in Java?

The double colon (::) operator, also known as method reference operator in Java, is used to call a method by referring to it with the help of its class directly. They behave exactly as the lambda expressions.

What does +++ mean in Java?

Thus in case of i+++j , we have original value of i when expression is evaluated, and i is incremented after the evaluation is completed. In case of ++j since its prefix value is incremented before evaluation. This i+++j is equal to (i++)+j and i+ ++j is equivalent to i + (++j) .

What does comma mean in Java?

In Java, the comma is a separator used to separate elements in a list in various contexts. It is not an operator and does not evaluate to the last element in the list.

What does 3 dots mean in Java?

The three dots ( ) are used in a function’s declaration as a parameter. These dots allow zero to multiple arguments to be passed when the function is called. The three dots are also known as var args .

What && means in Java?

The symbol && denotes the AND operator. It evaluates two statements/conditions and returns true only when both statements/conditions are true.

How does MOD work in Java?

Modulo or Remainder Operator returns the remainder of the two numbers after division. If you are provided with two numbers, say A and B, A is the dividend and B is the divisor, A mod B is there a remainder of the division of A and B.

What is this in programming?

The keyword this is a Java language keyword that represents the current instance of the class in which it appears. It is used to access class variables and methods. Since all instance methods are virtual in Java, this can never be null.

Is i ++ the same as i += 1?

There is no difference, both do the same thing. The i++ is shorthand for i += 1 . You can use other numbers for +=, like “i += 2” if you wanted to print only even numbers, for example, but i++ only increments by one. We also have i– , which is the same as i -= 1 .

What is semicolon example?

A semicolon may be used between independent clauses joined by a connector, such as and, but, or, nor, etc., when one or more commas appear in the first clause. Example: When I finish here, and I will soon, I’ll be glad to help you; and that is a promise I will keep.

Does every statement in Java end in a semicolon?

In Java and C++, every statement ends with a semicolon. In Scala—like in JavaScript and other scripting languages—a semicolon is never required if it falls just before the end of the line.

What symbol is the colon?

The colon is the symbol “:”. It is used in a number of different ways in mathematics. 1. To denote ratio or odds, as in 2:1 (voiced “two to one”).

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