Dart Operators

In this chapter, we will learn about different Dart Operators that are available in dart.

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Dart Operators

Operators are symbols that are used to perform certain operations. For example,

5 - 3;

Here – is the operator and 5 and 3 are the operands.

– operator is used to subtract the value from 5 and 3, which results in 2.

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Dart Operator Types

Dart supports all the operators that are available in modern programming languages.

• Arithmetic Operators
• Comparison Operators
• Assignment Operators
• Type test Operators
• Bitwise Operators
• Logical Operators
• Conditional Operators

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Dart Arithmetic Operators

Arithmetic operators help in performing arithmetic operations. For example,

void main() {

int num = 5 - 3;

print(num); // 2

}

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Here, – operator is used to subtract value 3 from value 5, which results in 2.

Operator	Name	Description
+	Addition	Adds two operands
–	Subtraction	Subtracts two operands
-expr	Unary Minus	Reverse the sign of the expression
*	Multiply	Multiply two operands
/	Division	Divide two operands
~/	Division	Divide two operands and give integer output
%	Modulus	Give reminder of two operands
++	Increment	Increments the value by 1
– –	Decrement	Decrements the value by 1

Arithmetic Operators Examples

void main() {

var num1 = 3 + 4; // 7

var num2 = 4 - 3; // 1

var num3 = 4 * 3; // 12

var num4 = 4 / 3; // 1.3333333333333333

var num5 = 4 ~/ 3; // 1

var num6 = 4 % 3; // 1

}

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Dart Comparison Operators

Comparison operators help in comparing two operands and give boolean results true or false. For example,

void main() {

var num = 5 > 3;

print(num); // true

}

Operator	Name	Description
==	Equal	True if both operands are equal
!=	Not Equal	True if both operands are not equal
>	Greater than	True if left operand is greater than right operand
<	Less than	True if left operand is less than right operand
>=	Greater than or equal	True if left operand is greater than or equal to right operand
<=	Less than or equal	True if left operand is less than or equal to right operand

Comparison Operators Examples

void main() {

var num1 = 3 < 4; // true

var num2 = 4 > 3; // false

var num3 = 3 >= 3; // true

var num4 = 3 <= 3; // true

var num5 = 3 == 3; // true

var num6 = 4 != 3; // true

}

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Dart Assignment Operators

Assignment operator help is assigning a value to a variable. For example,

var num = ‘hello’;

Operator	Name	Description
=	Assignment	Assign values to variable
-=	Subtraction Assignment	Assign value after subtraction
+=	Addition Assignment	Assign value after addition
/=	Division Assignment	Assign value after division
%=	Modulus Assignment	Assign value after modulus
*=	Multiply Assignment	Assign value after multiplication
~/=	Integer Division Assignment	Assign value after integer division

Assignment Operators Examples

void main() {

var num1 = 5; // 5

var num1 -= 4; // num1 = num1 - 4

var num3 +=4; // num1 = num1 + 4

var num4 /= 5; // num1 = num1 / 5

var num5 *= 5; // num1 = num * 5

}

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Type Test Operators

Type test operators help in comparing the operands. For example,

void main()

{

    String a = 'hello';

    int b = 3;

 

    print(a is String); // true

    print(b is !int); // false

}

Operator	Name	Description
is	is	True if specified data type
is!	is not	True if not specified data type

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Dart Bitwise Operators

Bitwise operators help in performing bitwise operations. For example,

void main()

{

    int a = 3;

    int b = 2;

 

    // Bitwise AND

    var c = a & b;

    print(c); // 2 

}

Operator	Name	Description
&	AND	AND operation on two operands
|	OR	OR operation on two operands
^	XOR	XOR operation on two operands
~expr	Unary bitwise complement	0s become 1s; 1s become 0s
<<	Shift Left	Shifts a in binary representation to b bits to left and inserting 0 from right.
>>	Shift Right	Shifts a in binary representation to b bits to left and inserting 0 from left.

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Dart Logical Operators

Logical operators help in performing logical operations and return a boolean value. For example,

void main()

{

    int a = 7;

    int b = 2;

 

    // And Operator

    bool c = a > 10 && b < 10;

    print(c); // false

}

Operator	Name	Description
&&	AND	True if both the operands are true
||	OR	True if either of the operands is true
!	NOT	True if the operand is false

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That’s it for the operators. In the next chapter, we will learn about the Dart Comments and how we can use them in our program.