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TypeScript Operators

Last Updated : 07 Aug, 2025
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TypeScript operators are symbols or keywords that perform operations on one or more operands.

Below are the different TypeScript Operators:

Table of Content

TypeScript Arithmetic operators

In TypeScript, arithmetic operators are used to perform mathematical calculations.

Name

Description

Syntax

Addition(+)Adds two values or expressions.a + b
Subtraction(-)Subtracts the right operand from the left operand.a - b
Multiplication(*)Multiplies two values or expressionsa * b
Division(/)Divides the left operand by the right operand.a / b
Modulus(%)Returns the remainder of the division of the left operand by the right operand.a % b
Increment(++)Increase the value of the operand by 1.a++ or ++a
Decrement(--)Decrease the value of the operand by 1.a-- or --a

TypeScript Logical operators

In TypeScript, logical operators are used to perform logical operations on Boolean values.

Name

Description

Syntax

Logical AND (&&)

Returns true if both operands are true.

result = operand1 && operand2;

Logical OR (||)

Returns true if at least one of the operands is true.

result = operand1 || operand2;

Logical NOT (!)

Returns true if the operand is false, and vice versa.

result = !operand;

TypeScript Relational operators

In TypeScript, relational operators are used to compare two values and determine the relationship between them.

Name

Description

Syntax

Equal to (==)

Returns true if the values of the two operands are equal, after type coercion.

result = operand1 == operand2;

Not equal to (!=)

Returns true if the values of the two operands are not equal, after type coercion.

result = operand1 != operand2;

Strictly equal to (===)

Returns true if the values of the two operands are equal, without type coercion (strict equality).

result = operand1 === operand2;

Strictly not equal to (!==)

Returns true if the values of the two operands are not equal, without type coercion (strict inequality).

result = operand1 !== operand2;

Greater than (>)

Returns true if the value of the left operand is greater than the value of the right operand.

result = operand1 > operand2;

Less than (<)

Returns true if the value of the left operand is less than the value of the right operand.

result = operand1 < operand2;

Greater than or equal to (>=)

Returns true if the value of the left operand is greater than or equal to the value of the right operand.

result = operand1 >= operand2;

Less than or equal to (<=)

Returns true if the value of the left operand is less than or equal to the value of the right operand

result = operand1 <= operand2;

TypeScript Bitwise operators

In TypeScript, bitwise operators perform operations on the binary representation of numeric values.

Name

Description

Syntax

Bitwise AND (&)

Performs a bitwise AND operation between each pair of corresponding bits.

result = operand1 & operand2;

Bitwise OR (|)

Performs a bitwise OR operation between each pair of corresponding bits.

result = operand1 | operand2;

Bitwise XOR (^)

Performs a bitwise XOR (exclusive OR) operation between each pair of corresponding bits.

result = operand1 ^ operand2;

Bitwise NOT (~)

Inverts the bits of the operand, changing each 0 to 1 and each 1 to 0.

result = ~operand;

Left Shift (<<)

Shifts the bits of the left operand to the left by the number of positions specified by the right operand.

result = operand1 << operand2;

Sign-propagating Right Shift (>>)

Shifts the bits of the left operand to the right by the number of positions specified by the right operand, preserving the sign bit.

result = operand1 >> operand2;

Zero-fill Right Shift (>>>)

Shifts the bits of the left operand to the right by the number of positions specified by the right operand, filling the leftmost bits with zeros.

result = operand1 >>> operand2;

TypeScript Assignment operators

In TypeScript, assignment operators are used to assign values to variables and modify their values based on arithmetic or bitwise operations.

NameDescriptionSyntax
Assignment (=)Assigns the value of the right operand to the left operand.variable = value;
Addition Assignment (+=)Adds the value of the right operand to the current value of the left operand and assigns the result to the left operand.variable += value;
Subtraction Assignment (-=)Subtracts the value of the right operand from the current value of the left operand and assigns the result to the left operand.variable -= value;
Multiplication Assignment (*=)Multiplies the current value of the left operand by the value of the right operand and assigns the result to the left operand.variable *= value;
Division Assignment (/=)Divides the current value of the left operand by the value of the right operand and assigns the result to the left operand.variable /= value;
Modulus Assignment (%=)Calculates the remainder when dividing the current value of the left operand by the value of the right operand and assigns the result to the left operand.variable %= value;

TypeScript Ternary/conditional operator

In TypeScript, the ternary operator, also known as the conditional operator, is a concise way to write conditional statements. It allows you to express a simple if-else statement in a single line.

NameDescriptionSyntax
Ternary/Conditional OperatorEvaluates the condition. If true, returns expression_if_true; if false, returns expression_if_false.condition ? expression_if_true : expression_if_false;

TypeScript Type Operators

In TypeScript, type operators are constructs that allow you to perform operations on types. These operators provide powerful mechanisms for defining and manipulating types in a flexible and expressive manner.

NameDescriptionSyntax
typeofObtains the type of a variable, function, or property.let x = 10;<br>type XType = typeof x;<br>// XType is 'number'
keyofObtains the keys (property names) of a type.type Person = { name: string; age: number };<br>type PersonKeys = keyof Person;<br>`// PersonKeys is 'name'
Mapped TypesAllows creating new types based on the properties of existing types.type Optional<T> = { [K in keyof T]?: T[K] };
Conditional TypesAllows expressing a type based on a condition.type TypeName<T> = T extends string ? 'string' : 'non-string';

TypeScript String Operators

In TypeScript, string operators and features are used for manipulating and working with string values.

NameDescriptionSyntax
String Concatenation (+)Concatenates two strings.let fullName = firstName + " " + lastName;
Template Literals (`)Allows embedding expressions inside strings.let message = I am ${age} years old.`;`
String InterpolationSimilar to template literals, it allows inserting variables into strings.let description = "I live in " + city + ".";
String MethodsVarious methods for manipulating strings.let substring = phrase.substring(7, 15);
String Length Property (length)Returns the length of a string.let length = message.length;

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