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  1. Tecnologia Web para desenvolvedores
  2. JavaScript
  3. Referncia JavaScript
  4. Operadores
  5. Diviso (/)
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Diviso (/)

Baseline Widely available

This feature is well established and works across many devices and browser versions. Its been available across browsers since julho de 2015.

O operador de diviso (/) produz o quociente de seus operandos onde o operando esquerdo o dividendo e o operando direito o divisor.

In this article

Experimente

console.log(12 / 2);
// Expected output: 6

console.log(3 / 2);
// Expected output: 1.5

console.log(6 / "3");
// Expected output: 2

console.log(2 / 0);
// Expected output: Infinity

Sintaxe

js
x / y

Exemplos

Diviso bsica

js
1 / 2; // 0.5

Math.floor(3 / 2); // 1

1.0 / 2.0; // 0.5

Diviso por zero

js
2.0 / 0; // Infinito

2.0 / 0.0; // Infinito, porque 0.0 === 0

2.0 / -0.0; // -Infinito

Especificaes

Specification
ECMAScript 2027 LanguageSpecification
# sec-multiplicative-operators

Compatibilidade de navegadores

Veja tambm

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  1. JavaScript
  2. Tutoriais
  3. Guia de JavaScript
    1. Introduo
    2. Gramtica e tipos
    3. Controle de fluxo e tratamento de erros
    4. Repetio e iterao
    5. Funes
    6. Expresses e operadores
    7. Numbers and strings
    8. Representing dates & times
    9. Expresses Regulares
    10. Colees indexadas
    11. Colees com chave (chave-valor)
    12. Trabalhando com objetos
    13. Using classes
    14. Usando "promises"
    15. Arranjos tipados em JavaScript
    16. Iteradores e geradores
    17. Resource management
    18. Internationalization
    19. JavaScript modules
  4. Intermedirio
    1. Language overview
    2. Estruturas de dados de JavaScript
    3. Comparadores de igualdade e semelhana
    4. Enumerabilidade e domnio de propriedades
    5. Closures
  5. Avanado
    1. Herana e a cadeia de "prototype"
    2. Metaprogramao
    3. Gerenciamento de memria
  6. Referncias
  7. Objetos pr-definidos
    1. AggregateError
    2. Array
    3. ArrayBuffer
    4. AsyncDisposableStack
    5. AsyncFunction
    6. AsyncGenerator
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    8. AsyncIterator
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  8. Expresses e operadores
    1. Adio (+)
    2. Addition assignment (+=)
    3. Assignment (=)
    4. Expresso da funo async
    5. async function* expression
    6. await
    7. Bitwise AND (&)
    8. Bitwise AND assignment (&=)
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    10. Bitwise OR (|)
    11. Bitwise OR assignment (|=)
    12. Bitwise XOR (^)
    13. Bitwise XOR assignment (^=)
    14. class expression
    15. Operador Vrgula
    16. Operador Condicional Ternrio
    17. Decrement (--)
    18. delete
    19. Atribuio via desestruturao (destructuring assignment)
    20. Diviso (/)
    21. Division assignment (/=)
    22. Equality (==)
    23. Operador Exponencial
    24. Exponentiation assignment (**=)
    25. Expresso de funo (function expression)
    26. Expresso function*
    27. Greater than (>)
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    29. Operador de Agrupamento
    30. import.meta
      1. import.meta.resolve()
    31. import()
    32. in operator
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    35. instanceof
    36. Left shift (<<)
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    40. AND lgico (&&)
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    45. Multiplication (*)
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    47. new operator
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    55. Assessores de propriedade
    56. Remainder (%)
    57. Remainder assignment (%=)
    58. Right shift (>>)
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    60. Sintaxe de Espalhamento
    61. Strict equality (===)
    62. Strict inequality (!==)
    63. Subtrao (-)
    64. Subtraction assignment (-=)
    65. super
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    68. Unary negation (-)
    69. Unary plus (+)
    70. Unsigned right shift (>>>)
    71. Unsigned right shift assignment (>>>=)
    72. void operator
    73. yield
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  9. Afirmaes e declaraes
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  11. Classes
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  12. Expresses Regulares
    1. Backreference: \1, \2
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    15. Quantifier: *, +, ?, {n}, {n,}, {n,m}
    16. Escape de classes de caracteres unicode: \p{...}, \P{...}
    17. Wildcard: .
    18. Word boundary assertion: \b, \B
  13. Erros
    1. AggregateError: No Promise in Promise.any was resolved
    2. Error: Permission denied to access property "x"
    3. InternalError: too much recursion
    4. RangeError: argument is not a valid code point
    5. RangeError: BigInt division by zero
    6. RangeError: BigInt negative exponent
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    12. RangeError: repeat count must be less than infinity
    13. RangeError: repeat count must be non-negative
    14. RangeError: x can't be converted to BigInt because it isn't an integer
    15. ReferenceError: "x" no est definido
    16. ReferenceError: Atribuio varivel no declarada "x"
    17. ReferenceError: can't access lexical declaration`X' before initialization
    18. ReferenceError: must call super constructor before using 'this' in derived class constructor
    19. ReferenceError: super() called twice in derived class constructor
    20. SyntaxError: 'arguments'/'eval' can't be defined or assigned to in strict mode code
    21. SyntaxError: "0"-prefixed octal literals are deprecated
    22. SyntaxError: "use strict" not allowed in function with non-simple parameters
    23. SyntaxError: "x" is a reserved identifier
    24. SyntaxError: \ at end of pattern
    25. SyntaxError: uma declarao na cabea de um lao for-of no pode ter um inicializador
    26. SyntaxError: applying the 'delete' operator to an unqualified name is deprecated
    27. SyntaxError: arguments is not valid in fields
    28. SyntaxError: await is only valid in async functions, async generators and modules
    29. SyntaxError: await/yield expression can't be used in parameter
    30. SyntaxError: cannot use ?? unparenthesized within || and && expressions
    31. SyntaxError: character class escape cannot be used in class range in regular expression
    32. SyntaxError: continue must be inside loop
    33. SyntaxError: duplicate capture group name in regular expression
    34. SyntaxError: duplicate formal argument x
    35. SyntaxError: as declaraes da cabea do lao for-in podem no ter inicializadores
    36. Erro de sintaxe: declarao de funo requer um nome
    37. SyntaxError: functions cannot be labelled
    38. SyntaxError: getter and setter for private name #x should either be both static or non-static
    39. SyntaxError: getter functions must have no arguments
    40. SyntaxError: identifier starts immediately after numeric literal
    41. SyntaxError: illegal character
    42. SyntaxError: import declarations may only appear at top level of a module
    43. SyntaxError: incomplete quantifier in regular expression
    44. ReferenceError: invalid assignment left-hand side
    45. SyntaxError: invalid BigInt syntax
    46. SyntaxError: invalid capture group name in regular expression
    47. SyntaxError: invalid character in class in regular expression
    48. SyntaxError: invalid class set operation in regular expression
    49. SyntaxError: invalid decimal escape in regular expression
    50. SyntaxError: invalid identity escape in regular expression
    51. SyntaxError: invalid named capture reference in regular expression
    52. SyntaxError: invalid property name in regular expression
    53. SyntaxError: invalid range in character class
    54. SyntaxError: invalid regexp group
    55. SyntaxError: flag de expresso regular invlida "x"
    56. SyntaxError: invalid unicode escape in regular expression
    57. SyntaxError: JSON.parse: bad parsing
    58. SyntaxError: label not found
    59. Erro de Sintaxe: faltando : depois da propriedade id
    60. Erro de sintaxe falta ) depois da lista de argumentos
    61. SyntaxError: missing ) after condition
    62. SyntaxError: missing ] after element list
    63. SyntaxError: missing } after function body
    64. SyntaxError: missing } after property list
    65. SyntaxError: missing = in const declaration
    66. SyntaxError: missing formal parameter
    67. SyntaxError: missing name after . operator
    68. SyntaxError: missing variable name
    69. SyntaxError: negated character class with strings in regular expression
    70. SyntaxError: new keyword cannot be used with an optional chain
    71. SyntaxError: nothing to repeat
    72. SyntaxError: numbers out of order in {} quantifier.
    73. SyntaxError: octal escape sequences can't be used in untagged template literals or in strict mode code
    74. SyntaxError: parameter after rest parameter
    75. SyntaxError: private fields can't be deleted
    76. SyntaxError: property name __proto__ appears more than once in object literal
    77. SyntaxError: raw bracket is not allowed in regular expression with unicode flag
    78. SyntaxError: redeclaration of formal parameter "x"
    79. SyntaxError: reference to undeclared private field or method #x
    80. SyntaxError: rest parameter may not have a default
    81. SyntaxError: return not in function
    82. SyntaxError: setter functions must have one argument
    83. SyntaxError: unterminated string literal
    84. SyntaxError: super() is only valid in derived class constructors
    85. SyntaxError: tagged template cannot be used with optional chain
    86. SyntaxError: Unexpected '#' used outside of class body
    87. SyntaxError: Unexpected token
    88. SyntaxError: unlabeled break must be inside loop or switch
    89. SyntaxError: unparenthesized unary expression can't appear on the left-hand side of '**'
    90. SyntaxError: use of super property/member accesses only valid within methods or eval code within methods
    91. SyntaxError: Using //@ to indicate sourceURL pragmas is deprecated. Use //# instead
    92. TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed
    93. TypeError: 'x' is not iterable
    94. TypeError: "x" is (not) "y"
    95. TypeError: "x" is not a constructor
    96. TypeError: "x" is not a function
    97. TypeError: "x" is not a non-null object
    98. TypeError: "x" is read-only
    99. TypeError: already executing generator
    100. TypeError: BigInt value can't be serialized in JSON
    101. TypeError: calling a builtin X constructor without new is forbidden
    102. TypeError: can't access/set private field or method: object is not the right class
    103. TypeError: can't assign to property "x" on "y": not an object
    104. TypeError: can't convert BigInt to number
    105. TypeError: can't convert x to BigInt
    106. TypeError: can't define property "x": "obj" is not extensible
    107. TypeError: can't delete non-configurable array element
    108. TypeError: can't redefine non-configurable property "x"
    109. TypeError: can't set prototype of this object
    110. TypeError: can't set prototype: it would cause a prototype chain cycle
    111. TypeError: cannot use 'in' operator to search for 'x' in 'y'
    112. TypeError: class constructors must be invoked with 'new'
    113. TypeError: cyclic object value
    114. TypeError: derived class constructor returned invalid value x
    115. TypeError: getting private setter-only property
    116. TypeError: Initializing an object twice is an error with private fields/methods
    117. TypeError: invalid 'instanceof' operand 'x'
    118. TypeError: invalid Array.prototype.sort argument
    119. TypeError: atribuio invlida para const "x"
    120. TypeError: Iterator/AsyncIterator constructor can't be used directly
    121. TypeError: matchAll/replaceAll must be called with a global RegExp
    122. TypeError: More arguments needed
    123. TypeError: null/undefined has no properties
    124. TypeError: property "x" is non-configurable and can't be deleted
    125. TypeError: Reduce of empty array with no initial value
    126. TypeError: setting getter-only property "x"
    127. TypeError: WeakSet key/WeakMap value 'x' must be an object or an unregistered symbol
    128. TypeError: X.prototype.y called on incompatible type
    129. URIError: malformed URI sequence
    130. Warning: -file- is being assigned a //# sourceMappingURL, but already has one
    131. Warning: unreachable code after return statement
  14. Mais contedo
    1. Viso geral das Tecnologias JavaScript
    2. Execution model
    3. Gramtica lxica
    4. Protocolos de iterao
    5. Strict mode - Modo estrito
    6. Template literals
    7. Trailing commas
    8. Funcionalidades depreciadas
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