Svep för att visa menyn

Operators let you perform calculations and compare values. Types of Operators

Arithmetic: +, -, *, /, %;
Assignment: =, +=, -=;
Comparison: ==, ===, !=, !==, >, <, >=, <=.


              12345678910111213
            
// Comparing with == (loose equality) vs === (strict equality)
console.log(5 == "5"); // true, because == does type conversion
console.log(5 === "5"); // false, because === checks both value and type

// Not equal operators
console.log(5 != "5"); // false, because == type conversion makes them equal
console.log(5 !== "5"); // true, different types

// Greater than, less than, greater than or equal to, less than or equal to
console.log(7 > 3); // true
console.log(2 < 1); // false
console.log(4 >= 4); // true
console.log(9 <= 10); // true

When you use comparison operators, JavaScript evaluates the values as either truthy or falsy. A truthy value is any value that is considered true when evaluated in a Boolean context, while a falsy value is one that is considered false. The most common falsy values in JavaScript are:

false;
0 (the number zero);
"" (empty string);
null;
undefined;
NaN (not a number).

All other values are considered truthy.

Var allt tydligt?

Tack för dina kommentarer!

Avsnitt 1. Kapitel 6

Fråga AI

Fråga vad du vill eller prova någon av de föreslagna frågorna för att starta vårt samtal

Operatorer och Jämförelser

Operators let you perform calculations and compare values. Types of Operators

Arithmetic: +, -, *, /, %;
Assignment: =, +=, -=;
Comparison: ==, ===, !=, !==, >, <, >=, <=.


              12345678910111213
            
// Comparing with == (loose equality) vs === (strict equality)
console.log(5 == "5"); // true, because == does type conversion
console.log(5 === "5"); // false, because === checks both value and type

// Not equal operators
console.log(5 != "5"); // false, because == type conversion makes them equal
console.log(5 !== "5"); // true, different types

// Greater than, less than, greater than or equal to, less than or equal to
console.log(7 > 3); // true
console.log(2 < 1); // false
console.log(4 >= 4); // true
console.log(9 <= 10); // true

false;
0 (the number zero);
"" (empty string);
null;
undefined;
NaN (not a number).

All other values are considered truthy.

Var allt tydligt?

Tack för dina kommentarer!

Avsnitt 1. Kapitel 6