Operators in Javascript

According to tutorialsteacher, An operator performs some operation on single or multiple operands (data value) and produces a result. Javascript like any other language has a couple of operators. Today, we will dive into Arithmetic and Logical operators.

Arithmetic operators

The Arithmetic operator includes subtraction -, addition +, multiplication *, division /, and Remainder operator. %. They are mostly used with number and string types.

The addition operator can be used to concatenate strings,

1let firstName = 'Ned';
2let lastName = 'Stark;
3
4let fullName = firstName + lastName;
5// Ned Stark

The rest work with number types

1const title = ''
2console.log(title || 'comissioner');
3// expected output: comissioner
4

The AND operator (&&) takes multiple boolean operands and will be true if and only if all the operands are true. Else, it will be false.

1console.log(true && true && false);
2// expected output: false
3
4console.log(true && true && true);
5// expected output: true
6

The nullish coalescing operator ?? returns its right operand if its left operand is null or undefined, and otherwise returns its left operand.

1console.log(null ?? 'random stuff');
2// expected output: "default string"
3
4console.log( 0 ?? 4);
5// expected output: 0
6

Conclusion

In this article, you were re-introduced to arithmetic and logical operators.