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Introduction to Dart

bookBasic Math Operations

Numbers

You already know how to use the print() function. We used to output text, but what about numbers and mathematical calculations?

Remember to use print() if you want to display your data. Also, there is no need to use quotes (" " or ' ') since we are evaluating a mathematical expression this time.

main.dart

main.dart

copy

              
12345

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

Math Operations

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
}

Math Expressions

We also can write math expressions. The sequence of actions will work the same as in mathematics, where 2+2*2 = 6, because the multiplication is done before the addition.

main.dart

main.dart

copy

              
123

            
void main() {
  print(2+2*2); // Output 6
}
question mark

Select the correct numbers multiplication.

Select the correct answer

Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 1. ChapterΒ 5

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bookBasic Math Operations

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Numbers

You already know how to use the print() function. We used to output text, but what about numbers and mathematical calculations?

Remember to use print() if you want to display your data. Also, there is no need to use quotes (" " or ' ') since we are evaluating a mathematical expression this time.

main.dart

main.dart

copy

              
12345

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

Math Operations

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
}

Math Expressions

We also can write math expressions. The sequence of actions will work the same as in mathematics, where 2+2*2 = 6, because the multiplication is done before the addition.

main.dart

main.dart

copy

              
123

            
void main() {
  print(2+2*2); // Output 6
}
question mark

Select the correct numbers multiplication.

Select the correct answer

Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 1. ChapterΒ 5
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