Function addNumericSeparator

lib/internal/util/inspect.js:2165–2176

(integerString)

}

function addNumericSeparator(integerString) {
  let result = '';
  let i = integerString.length;
  assert(i !== 0);
  const start = integerString[0] === '-' ? 1 : 0;
  for (; i >= start + 4; i -= 3) {
    result = `_${StringPrototypeSlice(integerString, i - 3, i)}${result}`;
  }
  return i === integerString.length ?
    integerString :
    `${StringPrototypeSlice(integerString, 0, i)}${result}`;
}

function addNumericSeparatorEnd(integerString) {
  let result = '';