Which one is better pre increment or post increment?

Pre-increment is faster than post-increment because post increment keeps a copy of previous (existing) value and adds 1 in the existing value while pre-increment is simply adds 1 without keeping the existing value.

Should I use ++ i or ++ in for loops?

What this says is that from the point of view of the generated byte code there’s no difference in a loop. In other contexts there is a difference between ++i and i++, but not for loops. +1 for going the extra mile. It’s not the loop that’s doing it, it’s the fact that it’s not in a larger expression context.

Is pre increment more efficient?

If the counter is not a fundamental type and the result of the increment is not used and optimizations are disabled, then pre increment may be more efficient. If the counter is a complex type and the result of the increment is used, then pre increment is typically faster than post increment.

Which is better i i 1 or i ++ from compilers perspective?

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.

What is difference between i ++ and ++ i in C?

The only difference is the order of operations between the increment of the variable and the value the operator returns. So basically ++i returns the value after it is incremented, while i++ return the value before it is incremented.

What is the difference between pre increment and post-increment in for loop?

Pre-increment and post-increment both have the same side effect: incrementing the variable. They produce different values though: a pre-increment produces the value (paradoxically enough) from after the increment, whereas a post-increment produces the value from before the increment.

Why should we use i ++ instead of i 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.

Is ++ i or i ++ more efficient?

According to the Google C++ Style Guide, “when the return value is ignored, the ‘pre’ form ( ++i ) is never less efficient than the ‘post’ form ( i++ ), and is often more efficient.”

What is post increment and pre increment in Java?

Pre-increment means that the variable is incremented BEFORE it’s evaluated in the expression. Post-increment means that the variable is incremented AFTER it has been evaluated for use in the expression.

Is i ++ the same as ++ i?

i++ and ++i are very similar but not exactly the same. Both increment the number, but ++i increments the number before the current expression is evaluated, whereas i++ increments the number after the expression is evaluated.