converter/src/app/converter/dectohexconverter.ts

import {Converter} from './converter';

export class DecToHexConverter implements Converter {
  getDisplayname(): string {
    return 'Convert decimal to hexadecimal';
  }

  getId(): string {
    return 'dectohex';
  }

  convert(input: string): string {
    const n: number = parseInt(input, 10);
    if (isNaN(n)) {
      throw new Error('The input seems not to be a valid integer.');
    }
    return n.toString(16);
  }
}