I still don't understand how programming work?

Question

I am stress with Swift loop, Python loop and stuff... the ++ and -- sign is so confusing

Answer 1

Duplicate IT

++ means "keep adding"
while
-- means "keep subtracting"

Therefore,

if i = 1,

And we want to keep adding 1, then we'll say,

i++

i becomes 2 [i.e. i = 2]

i ++ again

i will now become 3 [i.e. i = 3]

And that's how it goes on...

If we want to add 3,

It will be: i += 3 (or i = i + 3)

So if i = 0;

And we say, i += 3, then i will be 0 + 3 which is 3.

i += 3 again

...will give you 3 + 3 = 6.

i += 3 again

...will give you 6 + 3 = 9.

i += 3 again

...will give you 9 + 3 = 12.

And it keeps going that way forever...

Answer 2

++ is used to increase/increment the value of a variable by 1. In other words, it adds 1 to the variable. -- subtracts 1 from a variable. Loops are used for repetition.

Answer 3

V F Yes, it is the same in JS and many other OOP languages like Python, etc.

Answer 4

Please note that ++ and -- are not available in Python.

Edit: oh I realise you may be using Swift.

Answer 5

V F This is for you.

https://code.sololearn.com/Wtg4Xc2nITd6/?ref=app

Answer 6

Operators

1. ++ increment
2. -- decrement

There are two types of increment(++) and decrement(--) operator : -

(i) pre increment
(ii) post increment

(i) pre increment increment the values first then assign to variable.

Ex: -

int i =7;

System.out.println(++i); // printing the variable in java

O/p - 8

Here, i is incremented first by 1 and then printed so became 8

Pre Decrement

System.out.println(--i); // printing the variable in java

O/p - 6

Here, i is Decremented first by 1 and then printed so became 6

(ii) Post Increment is assign tge value to variable first then incremented by 1.

Ex:-

int i=7;

System.out.println(i++); // printing statement in java

O/p - 7

Here, i is printed first then assigned to variable i if we print i variable again it will print 8.

Post decrement assign the value first then decremented by 1 same as post increment
Ex :-

int i = 8;
System.out.println(i--);
O/p - 8
Here, variable i printed first then incremented On printing i again
System.out.println(i); o/p- 9

Answer 7

Hopefully, by now you understand 😊

Answer 8

👑Duplicate IT💫⚘🌚 (Storm Me)
I can understand your problem. You are unable to understand how programming work, it means there is something wrong with your C basics. You can improve it by first clearing the basics of C and then moving to other programming languages.

Answer 9

++ increases the value by 1 and not by 2.

Answer 10

Duplicate IT 👍

Answer 11

Those are binary operators requiring two operands e.g. a and b.

a=1
b=2
print(a+b) # gives 3
print(a-b) # gives -1

Answer 12

i+=3 is the same as saying i=i+3.

Answer 13

BTW, when using i+=3, note that the operator is += and not just +

Answer 14

It will be 3 more than what it was before the statement.

Answer 15

Just read it all slowly again

Answer 16

At start it will seem little bit confusing, but when you start praticing you will start to understand the concept behind it and then you can talk with your computer.

Answer 17

Sonic so what is single plus? + or -

Answer 18

Sonic where did u see the +i or i+
Like i+ = 3, i dont remember, but it like that
Can you explain?

Answer 19

Sonic so what is the value of i, if i = i+3😂

Answer 20

https://code.sololearn.com/cz2U7fj2BQ14/?ref=app