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Introduction to Dart

bookBasic Math Operations

You already know how to use the print() function to display text. It can also be used to output numbers and perform mathematical calculations. Use print() whenever you want to display data. Do not use quotes (" " or ' '), since this time you’re evaluating a mathematical expression.

main.dart

main.dart

copy

              
12345

            
void main() {
  print('Two');   // String 
  print('2');     // String   
  print(2);       // Number    
}
Note
Study More

In Dart, if a number is written in quotes ("123"), it is treated as text (a string) rather than an actual number. This means you can't perform math operations like addition or multiplication on it.

Almost no program can do without mathematical calculations, so Dart supports the following mathematical operations:

main.dart

main.dart

copy

              
1234567

            
void main() {
  print(1+2); // Adding numbers
  print(9-3); // Subtracting numbers
  print(4/2); // Division of numbers
  print(4*2); // Multiplication of numbers
  print(5%2); // Get the remainder from the whole division of 5 by 2
}

You can also write mathematical expressions. The order of operations follows standard math rules, so 2 + 2 * 2 = 6 because multiplication is performed before addition.

main.dart

main.dart

copy

              
123

            
void main() {
  print(2+2*2);
}
Note
Note

The same rule applies to brackets, expressions inside parentheses are calculated first, just like in regular mathematics.

question mark

Select the correct numbers multiplication.

Select the correct answer

War alles klar?

Wie können wir es verbessern?

Danke für Ihr Feedback!

Abschnitt 1. Kapitel 5

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bookBasic Math Operations

Swipe um das Menü anzuzeigen

You already know how to use the print() function to display text. It can also be used to output numbers and perform mathematical calculations. Use print() whenever you want to display data. Do not use quotes (" " or ' '), since this time you’re evaluating a mathematical expression.

main.dart

main.dart

copy

              
12345

            
void main() {
  print('Two');   // String 
  print('2');     // String   
  print(2);       // Number    
}
Note
Study More

In Dart, if a number is written in quotes ("123"), it is treated as text (a string) rather than an actual number. This means you can't perform math operations like addition or multiplication on it.

Almost no program can do without mathematical calculations, so Dart supports the following mathematical operations:

main.dart

main.dart

copy

              
1234567

            
void main() {
  print(1+2); // Adding numbers
  print(9-3); // Subtracting numbers
  print(4/2); // Division of numbers
  print(4*2); // Multiplication of numbers
  print(5%2); // Get the remainder from the whole division of 5 by 2
}

You can also write mathematical expressions. The order of operations follows standard math rules, so 2 + 2 * 2 = 6 because multiplication is performed before addition.

main.dart

main.dart

copy

              
123

            
void main() {
  print(2+2*2);
}
Note
Note

The same rule applies to brackets, expressions inside parentheses are calculated first, just like in regular mathematics.

question mark

Select the correct numbers multiplication.

Select the correct answer

War alles klar?

Wie können wir es verbessern?

Danke für Ihr Feedback!

Abschnitt 1. Kapitel 5
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