RegExp for validating PRICE [closed]

Answer 1

RegExp for validating Price Fields:

/^(\d*([.,](?=\d{3}))?\d+)+((?!\2)[.,]\d\d)?$/

Explained demo: http://regex101.com/r/uG5lI0/1

Javascript code to validate:

/^(\d*([.,](?=\d{3}))?\d+)+((?!\2)[.,]\d\d)?$/.test(input)

Will validate only if in correct format, with dots or commas in their respective places.

International format for the en_US locale & US national format:

• 134.56
• 1,234.56
• 2,991,234.00

Italian national format with 2 decimals:

• 134,56
• 21.234,56
• 1.234,56
• 9.321.234,56

International format for the de_DE locale:

• 134,56
• 1234,56
• 98281234,56

Decimals are optional, validation for whole amounts:

• 1234
• 1,234
• 2,991,234
• 1.234
• 9.321.234

function validatePrice(input) {
  return /^(\d*([.,](?=\d{3}))?\d+)+((?!\2)[.,]\d\d)?$/.test(input);
}

['WRONG',
  '1,234,56',
  '1.234.56',
  '-1993',
  '918,27.63',
  '122.42.24',
  '1,89,2',
  '',
  'Intl. format & US national format',
  '2.56',
  '14.56',
  '134.56',
  '1,234.56',
  '2,991,234.00',
  '',
  'Italian national format with 2 decimals',
  '9,56',
  '24,56',
  '134,56',
  '721.234,56',
  '21.234,56',
  '1.234,56',
  '9.321.234,56',
  '69.321.234,56',
  '269.321.234,56',
  '1.269.321.234,56',
  'International format for the de_DE locale',
  '1,56',
  '14,56',
  '134,56',
  '1234,56',
  '98281234,56',
  'No cents',
  '1',
  '14',
  '134',
  '1,234',
  '2,991,234',
  '9',
  '24',
  '134',
  '1.234',
  '9.321.234',
  '1',
  '14',
  '134',
  '1234',
  '98281234'
].forEach(function(n) {
  document.getElementById('results').innerHTML += "'" + n + "' => " + validatePrice(n) + "
";
})