Member Avatar for Megha SR

i have got a program to convert a double value to a string.
eg==INPUT= 3.65
OUTPUT=three point six five.
can anyone give the solution.

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Dani AI

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wanted 3.65 -> "three point six five". As pointed out, the straightforward, reliable way is to treat the numeric value as a string and map each character to a spoken word. That avoids re-implementing full English-number grammar and matches the example (digit-by-digit after the decimal point).

A simple approach:

  • Get a stable decimal string (use BigDecimal.valueOf(double).toPlainString() or a DecimalFormat pattern if you need fixed decimal places).
  • Walk the string and map '0'..'9' to words, '.' to "point" (or "dot"), and '-' to "minus".
  • If you need the integer part read as natural words ("twelve" instead of "one two"), add a separate routine; that is a different problem.

Example Java implementation (compact, digit-by-digit):

private static final String[] DIGITS = {
  "zero","one","two","three","four","five","six","seven","eight","nine"
};

public static String numberToSpoken(double value, Integer fixedDecimals) {
  String s;
  if (fixedDecimals != null) {
    StringBuilder pat = new StringBuilder("0.");
    for (int i = 0; i < fixedDecimals; i++) pat.append('0');
    s = new java.text.DecimalFormat(pat.toString()).format(value);
  } else {
    s = java.math.BigDecimal.valueOf(value).toPlainString();
  }

  StringBuilder out = new StringBuilder();
  for (char c : s.toCharArray()) {
    if (c == '-') out.append("minus ");
    else if (c == '.') out.append("point ");
    else if (Character.isDigit(c)) out.append(DIGITS[c - '0']).append(' ');
  }
  return out.toString().trim();
}

Notes and pitfalls: doubles can lose the original number of decimal places (3.50 becomes 3.5), so if preserving trailing zeros matters, accept the input as a String or use a DecimalFormat pattern. For accurate monetary or exact decimal work, prefer BigDecimal input. If the goal is full English number names (hundreds/thousands), look for a number-to-words routine and apply it only to the integer part. Also heed ’s forum reminder about showing effort when the code is homework.

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Member Avatar for JamesCherrill

I guess you missed this on the main forum page:

don't expect quick solutions to your homework. We'll help you get started and exchange algorithm ideas, but only if you show that you're willing to put in effort as well

Edited by JamesCherrill because: n/a
Member Avatar for Member #814414

You can't convert 3 to 'three' directly. You need to write a method to examine each character and return an appropriate value.

e.g.
if(input is equal to 1)
return [appropriate String]

Then take the returned values and print them.

Edited by Member #814414 because: n/a
Member Avatar for Megha SR

thankyou coil for the answer

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