Task 3 - Binary number divisible by 5

• Question
• Answer

Question

You need to define a regular expression which tests if a given string representing a binary number is divisible by 5.

// 5 divisable by 5 divisibleByFive.test(‘101’) === true // 135 divisable by 5 divisibleByFive.test(‘10000111’) === true // 666 not divisable by 5 divisibleByFive.test(‘0000001010011010’) === false

Answer

const testReg = (value) => {
  const re =/^(0|1(10)*(0|11)(01*01|01*00(10)*(0|11))*1)$/
  const result = re.test(value)
  console.log(result);
}
testReg('101')
testReg('10000111')
testReg('0000001010011010')