**What is a logical operator in TypeScript?**

The **TypeScript****Logical operators** are used to merge multiple conditions into a single expression.

Giving a result that is either **True **or **False**.

It simply means, logical operators work with a set of operands and produce a result based on those operands.

Typically, they operate on boolean values, returning a boolean result.

However, if the operands are not boolean, **logical operators** may yield a non-boolean value.

Examples include logical AND (&&), logical OR (||), and logical NOT (!).

**Logical AND (&&) operator**

The Logical AND (&&) operator returns true only if both conditions are true.

**Syntax:**

** samplecondition1 && samplecondition2**

**Here’s an example:**

**let samplecondition1 = true;
let samplecondition2 = false;
// Using the Logical AND operator
let result = samplecondition1 && samplecondition2; ✅
console.log(result);**

In our given example above, the samplecondition2 is false, the result of condition1 && condition2 is false.

**Output:**

**false**

On the other hand, if both **samplecondition1** and **samplecondition2** were true, the result would be true. This is how the Logical AND (&&) operator works.

**Here’s another example:**

**const x = 10;
const y = 20;
console.log(x > 1 && y > 1); ✅
console.log(x > 1 && y < 1); ✅**

**Output:**

**true
false**

**Explanation: **

The first condition** (x > 1) **is true, so the entire expression evaluates to true.

In the second line, both conditions **(x > 1 and y < 1)** must be true for the result to be true.

However, y is not less than 1, so the overall result is false.

**Logical OR (||) operator**

The **Logical OR (||) operator** returns true if either one of the conditions is true.

**Here’s an example:**

**let samplecondition1 = true;
let samplecondition2 = false;
// Using the Logical OR operator
let result = samplecondition1 || samplecondition2; ✅
console.log(result); **

**Output:**

**true**

**Here’s another example:**

**const x = 10;
const y = 20;
console.log(x > 1 || y > 1); ✅
console.log(x > 1 || y < 1); ✅ **

**Output:**

**true
true**

**Explanation:**

In the first line, we use the logical OR operator (`||`

). It returns `true`

if at least one of the conditions is `true`

.

**Here**:

**x > 1 is true (since 10 is greater than 1).
y > 1 is also true (since 20 is greater than 1).**

Since at least one condition is **true**, the result is **true**.

**In the second line:**

**x > 1 is still true.
y < 1 is false (since 20 is not less than 1).**

However, we only need one true condition for the entire expression to be true.

So, the result is still `true`

.

**Logical NOT (!) operator**

The **Logical NOT (!) ** operator gives the opposite outcome of the expression’s result.

For instance, if the expression is `!(>5)`

, it will return `false`

.

**Here’s an example:**

**let condition = true;
// Using the Logical NOT operator ✅
let result = !condition;
console.log(result);**

In one example, the condition is true. The Logical NOT (!) operator returns the inverse of the condition.

**Output:**

**false**

So, ! the condition is false. Hence, a false is printed to the console.

If the condition were false,! the condition would be true. This is how the Logical NOT (!) operator works.

**Remember:**

We can be able to combine the** Logical Operators AND (&&) and OR (||)**, however you have to consider the precedence.

Here’s the order of precedence for logical operators with other pertinent operator:

- Parenthesis or Grouping
**( )** - Logical NOT
**!** - Equality
**==** - Not equal
**!=** - Strict Equality
**===** - Not strict Equal
**!==** - logical AND
**&&** - Logical OR
**||** - Nullish coalescing operator
**??**

**Conclusion**

So that’s the end of our discussion about **TypeScript logical operators,** which are used to merge multiple conditions into a single expression, resulting in either true or false.

I hope this article has provided you with insights and helped you understand the **logical operators TypeScript**.

If you have any questions or inquiries, please don’t hesitate to leave a comment below.