i++ or ++i?, C++ FAQ (2024)

FAQs

Does ++ i or i ++ matter in for loop? ›

This means that there is sequence point in for loop after every expression. So, it doesn't matter whether you do ++i or i++ or i+=1 or i=i+1 in the 3rd expression of for loop.

In C, ++ and -- operators are called increment and decrement operators. They are unary operators needing only one operand. Hence ++ as well as -- operator can appear before or after the operand with same effect. That means both i++ and ++i will be equivalent.

++i is sometimes faster than, and is never slower than, i++. For intrinsic types like int, it doesn't matter: ++i and i++ are the same speed. For class types like iterators or the previous FAQ's Number class, ++i very well might be faster than i++ since the latter might make a copy of the this object.

Though we can say that the ++i is slightly faster than i++. The i++ takes local copy of the value of i before incrementing, while ++i never does.

Unfortunately, in this case, trying to sound like you have good grammar makes things worse because the grammatically correct form is “with John and me,” not “with John and I.”

Sometimes it can be tricky to determine if you should be using "me" or "I" in a sentence. Use the pronoun "I" when the person speaking is doing the action, either alone or with someone else. Use the pronoun "me" when the person speaking is receiving the action of the verb in some way, either directly or indirectly.

i = i+1 will increment the value of i, and then return the incremented value. i++ will increment the value of i, but return the original value that i held before being incremented.

i++ increment the variable i by 1. It is the equivalent to i = i + 1. i– decrements (decreases) the variable i by 1.

--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.

As i++ does automatic typecasting and uses a compiler instruction which internally uses iadd instruction, i=i+1 is faster than i++.

Which statement is faster ++ i or i 1? ›

i++ is faster because they return value before.

i=i+1 will have to load the value of i , add one to it, and then store the result back to i . In contrast, ++i may simply increment the value using a single assembly instruction, so in theory it could be more efficient.

As a result, pre-increment is faster than post-increment because post-increment keeps a copy of the previous value where pre-increment directly adds 1 without copying the previous value.

So “I'd better” is more formal, but “I better” has its place. A: That's it.

++i means that when your code is executing it will first do i = i + 1 and then read it. i++ means that when your code is executing it will first read it and do the i = i + 1 after it has been read.

Wrong: Jane is making Mike and I pizza! Just because Mike is getting pizza too doesn't mean you change from "me" to "I." Right: Jane is making Mike and me pizza! If it "sounds wrong" to your ear, that's probably because you've been saying it and hearing it wrong all this time.

Use "I" when it is the subject of the sentence and use "me" when it is the object of the sentence. The correct statement is "Happy Birthday from Bob and me." The phrase "Bob and me" is the object of the preposition "from" so you should use the object pronoun "me."

But you need to know that you should say "Sally and I" ONLY when you need the subject of a sentence or phrase. If the words "Sally and I" are serving as the object of a phrase, then you need to switch to "Sally and me." Examples: Sally and I are going to the movie.

The correct way to say this is “My friend and I”.

The sentence should be "My aunt invited my friend and me to dinner." The first person singular pronoun "I" is used when it is the subject of a verb. The first person singular pronoun "me" is used when it is the object of a verb or preposition.

What is correct me and Tom or Tom and I? ›

Adding “Tom and” may confuse some people, but it doesn't change anything. You still use a subject pronoun like “I” if it's working together with “Tom and” as a subject. You still use an object pronoun like “me” if it's the object of a transitive verb or the object of a preposition.

The solution means to say that there is no difference, ++i has the same meaning as (i += 1) no matter what i happens to be and no matter the context of the expression.

Using += in loops

You can use += in for loop when you want to increment value of variable by more than 1. In general, you might have used i++ , but if you want to increment it by 2, then you can use i+=2 .

a++ and ++a both increment a by 1. The difference is that a++ returns the value of a before the increment whereas ++a returns the value after the increment. That is: a = 10; b = ++a; //a = 11, b = 11 a = 10; b = a++; //a = 11, b = 10.

It's shorthand for add 1.

to pay a great deal of attention to the details of something, especially when you are trying to complete a task: The negotiations are almost finished, but we still have to dot the i's and cross the t's.

Definition and meaning of the math word i. i. The letter i is used to signify that a number is an imaginary number. It stand for the square root of negative one. In electrical engineering it is often replaced by the letter j to avoid conflict with the symbol for current.

++a returns the value of an after it has been incremented. It is a pre-increment operator since ++ comes before the operand. a++ returns the value of a before incrementing. It is a post-increment operator since ++ comes after the operand.

It's fine as it is written. "my wife and I" is a noun phrase, functioning as a subjective pronoun in the singular and made possessive with the apostrophe. It is exactly the same as "our".

''Are'' is used when the noun or pronoun is second-person singular and for all plural nouns and pronouns.

What is faster ++ i or i ++ Java? ›

In Java there is no such difference. Java machine interpertes code and no matter if you write ++i or i++, it will be converted to byte code to exact same instruction set.

Both i++ and ++i are short-hand for i = i + 1 . In addition to changing the value of i, they also return the value of i, either before adding one ( i++ ) or after adding one ( ++i ). In a loop the third component is a piece of code that is executed after each iteration.

C++ is faster than Python because it is statically typed, which leads to a faster compilation of code. Python is slower than C++, it supports dynamic typing, and it also uses the interpreter, which makes the process of compilation slower.

i += 1 produces i after incrementing (like a preincrement), while i++ produces i before incrementing. Thus, int a = 0, b = 0; cout << (a+=1) << " " << b++ << endl; prints 1 0 .

+ is an arithmetic operator while += is an assignment operator..

In programming (Java, C, C++, JavaScript etc.), the increment operator ++ increases the value of a variable by 1. Similarly, the decrement operator -- decreases the value of a variable by 1. a = 5 ++a; // a becomes 6 a++; // a becomes 7 --a; // a becomes 6 a--; // a becomes 5.

There are two varieties of increment operator: Post-Increment: Value is first used for computing the result and then incremented. Pre-Increment: Value is incremented first and then the result is computed.

increment. / (ˈɪnkrɪmənt) / noun. an increase or addition, esp one of a series. the act of increasing; augmentation.

We often refer to something increasing by a small amount as "increasing only incrementally" to stem the notion that the increase was great or significant. But the increase doesn't have to be a single unit, and most often it is not.

Formal written English: Better than I

Therefore, if you want to sound educated and correct, it is safer to use “better than I.”

Is it I too or 2? ›

These three words are hom*ophones, meaning that they're pronounced the same way, but they're all spelled differently, and they have very different meanings. So when should you use each word? The short answer is that to is a preposition that indicates direction, too means also or indicates excess, and two is a number.

The auxiliary verb 'will' is used primarily in the future tense. On the other hand, the verb 'can' is used in the sense of 'ability'. In other words, the verb 'can' indicates 'ability', but it does not indicate future tense as 'will' does. This is the main difference between the two words.

The equal-to operator ( == ) returns true if both operands have the same value; otherwise, it returns false . The not-equal-to operator ( !=

C++ is known as an intermediate-level language that adds object-oriented features to its base C, whereas C# is a high-level language. C++ compiles programs to Machine Codes, and C# compiles programs to Common Language Runtime or CLR.

For example, in the statement "v=i++", where the operator is in the postfix form, the value of "i" is assigned to "v" before the increment operation. In the statement "v =++i", where the operator is in the prefix form, the value of "i" is incremented first before being assigned to "v".

You can use anything in loop like for(int j = 0; j < 10; j++) { } It is not necessary to use only i.

"i" is a temporary variable used to store the integer value of the current position in the range of the for loop that only has scope within its for loop. You could use any other variable name in place of "i" such as "count" or "x" or "number".

The variable "i" below is always used as the loop counter. The variables, start_value,by_count,and finish_value all represent numbers. For each language and example of the code to sum the numbers from 1 to 10 is given.

In a for loop, the index of iteration is always a clearly defined variable. By common practice, the variable is usually the letter i. This makes it easy to index one or more arrays by the index. For loops can easily be used to iterate through elements of multidimensional arrays using nested for loops.

So, we can write two for loops in a code and it is called as nested for loop. But first for loop executes then goes to second for loop.

Which is better for loop or while loop? ›

Use a for loop when you know the loop should execute n times. Use a while loop for reading a file into a variable. Use a while loop when asking for user input. Use a while loop when the increment value is nonstandard.

And in the increment section ( i++ ) we increase the value of our counter value every time we complete a loop of the FOR loop. The ++ symbol we use in the increment section is called the increment operator - it works just like any counter you can think of in real life.

Note that the increment operator does not exist in python, you have to either write the whole thing out or use the add assignment operator i += 1. Note that there are post ( i++ ) and pre ( ++i ) increment operators, as well as equivalent decrement operators --i i-- .

Loops are control structures used to repeat a given section of code a certain number of times or until a particular condition is met. Visual Basic has three main types of loops: for.. next loops, do loops and while loops.

Generally the i in for loops stands for iterator, that's why most of programmers use i instead of other names. i and j are just a variable name, you can use any variable name like a, b, c,x, y or number, length etc.

i = i+1 will increment the value of i, and then return the incremented value. i++ will increment the value of i, but return the original value that i held before being incremented.