Darts programming - Arithmetic Operations

How are you guys? After several updates to some of the functionality of this web, I decided that the conversation of the first party becomes me, and the conversation of the second party is you, hehe, it's not good because it's impolite. Okay, let's continue to the topic.

Understanding

Surely the readers here know, if the basic arithmetic operations are addition, subtraction, multiplication and division, and there are also more advanced ones, such as percentage manipulation , square root s, exponents, logarithmic functions, and so on.

When we code using a programming language that is static in data type, we cannot just give random division/multiplication. Because it will generate error later. So, pay close attention to the following operations. And if you want to practice, go straight to dartpad yes

Cheat sheet

Discussion

Add

Addition with operator (+). Maybe you will immediately understand.

example 5+5 = ? the answer must be 10.

Let's go to code:

void main() {
  vara = 5;
  varb = 5;
  
  varc = a+b;
  print(c);
}

Result

10

Less

Subtraction with operator (-). Maybe you will immediately understand too.

example 5-5 = ? the answer is definitely 0.

Sample code

void main() {
  vara = 5;
  varb = 5;
  
  var c = a-b;
  print(c);
}

The result is

0

Divide

Divide with the operator (/).

example 20/10 = ? the answer is definitely 2

sample code

void main() {
  vara = 20;
  varb = 10;
  
  varc = a/b;
  print(c);
}

The result

2

Please be careful with data types, case examples

void main() {
  vara = 20;
  varb = 9;
  
  int c = a/b;
  print(c);
}

The result is error

Multiplication

Multiply with operator (*).

example 5*5 = ? The result is 25

sample code

void main() {
  vara = 5;
  varb = 5;
  
  varc = a*b;
  print(c);
}

Result

25

Division returns an integer

operator (~/)

example 29/5 = ? The result is 5. Why? Because of rounding down, or you could say clearing decimal

example code

void main() {
  vara = 29;
  varb = 5;
  
  int c = a~/b;
  print(c);
}

The result is

5

Modulus

operator (%)

Modulus is the remainder of the quotient.

example 25 % 5 = ? the result is 0

example code

void main() {
  vara = 25;
  varb = 5;
  
  int c = a%b;
  print(c);
}

Result is

0

Increment

operator (++) p>

It is added sequentially.

example:

void main() {
  int i = 1;
  i++;
  print(i);
}

The result is

2

why 2? because (++) adds one number. So basically i above is 1 + 1

2nd example

 void main() {
  int i = 1;
  i++;
  i++;
  print(i);
}

Well, now there are 2 i++, what's the result? yep.. the result is

3

essentially 1+1+1 = 3

decrement

operator (--)

Represents subtraction sequentially.

example:

 void main() {
  int i = 1;
  i--;
  print(i);
}

The result is

0

why 0? because (--) subtracts one number. So the point i above is 1 - 1

example 2nd

void main() {
  int i = 1;
  i--;
  i--;
  print(i);
}

Well, now there are 2 i--, what's the result? yep.. the result is

-1

essentially 1-1-1 = -1

Okay, thanks. Next we will discuss other operations. Keep here dude!