What is the difference between I — and — I in Java?
–i decrements i by 1 then gives you the value of i (4). i– gives you the value of i (5) then decrements it by 1. Both will give you the same result in a for loop.
What is the difference between i ++ and i 1 in Java?
What is the Difference Between i++ and ++i in Java? ++i and i++ both increment the value of i by 1 but in a different way. … Increment in java is performed in two ways, 1) Post-Increment (i++): we use i++ in our statement if we want to use the current value, and then we want to increment the value of i by 1.
What does I — mean in Java?
Increment (++) and decrement (—) operators in Java programming let you easily add 1 to, or subtract 1 from, a variable. For example, using increment operators, you can add 1 to a variable named a like this: a++; An expression that uses an increment or decrement operator is a statement itself.
Is i ++ the same as I 1?
These two are exactly the same. It’s just two different ways of writing the same thing. i++ is just a shortcut for i += 1 , which itself is a shortcut for i = i + 1 . These all do the same thing, and it’s just a question of how explicit you want to be.
Can we have this () and super () together?
both this() and super() can not be used together in constructor. this() is used to call default constructor of same class.it should be first statement inside constructor. … this() and super(), both are the constructors that’s why must be the first statement. But we can use both in a program.
What does != In Java mean?
Not Equal (!=)
The != operator is a comparison operator, also used in conditional expressions. It reads, “not equal”. If the compared values are not equal to each other than the expression returns true. … operator could be a program that multiplies two numbers but only if they are both non-zero values.
What does ++ var do in Java?
++var is the pre-increment operator; it increments the value of var before evaluating the expression. Similarly, var++ is the post-increment operator; it increments the value of var after evaluating the expression.
What does i and j mean in Java?
Answer: i and j are nothing but loop variables . … In patterns the i loop refers to the rows and the j loop refers to the columns .
What is int i 0 in Java?
The first statement declares an int variable named i and assigns it the value 0 . This statement is only executed once, when the for loop starts. … If you omit the curly braces, then only the first Java statement after the for loop statement is executed.
What does \ s+ mean in java?
Therefore, the regular expression s matches a single whitespace character, while s+ will match one or more whitespace characters.