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| let uni = [ | |
| '', | |
| 'um', 'dois', 'três', 'quatro', 'cinco', 'seis', 'sete', 'oito', 'nove', | |
| 'dez', | |
| 'onze', 'doze', 'treze', 'quatorze', 'quinze', 'dezesseis', 'dezessete', 'dezoito', 'dezenove', | |
| ] | |
| let dezenas = [ | |
| '', | |
| 'dez', | |
| 'vinte', | |
| 'trinta', | |
| 'quarenta', | |
| 'cinquenta', | |
| 'sessenta', | |
| 'setenta', | |
| 'oitenta', | |
| 'noventa', | |
| ] | |
| let centenas = [ | |
| '', | |
| 'cento', | |
| 'duzentos', | |
| 'trezentos', | |
| 'quatrocentos', | |
| 'quinhentos', | |
| 'seicentos', | |
| 'setecentos', | |
| 'oitocentos', | |
| 'novecentos', | |
| ] | |
| let grandezas = [ | |
| '', | |
| 'mil', | |
| 'milh', | |
| 'bilh', | |
| 'trilh', | |
| 'quatrilh', | |
| 'quintilh', | |
| ]; | |
| let gSing = 'ão'; | |
| let gPlu = 'ões' | |
| let g = 0; | |
| let popUnit = strRepr => { | |
| if(strRepr.length > 3) { | |
| let idx = strRepr.length - 3; | |
| return [ | |
| strRepr.substr(0, idx), | |
| strRepr.substr(idx, 3) | |
| ] | |
| } else { | |
| return ['', strRepr]; | |
| } | |
| } | |
| const subNumPorExtenso = strNum => { | |
| while(strNum.length < 3) { | |
| strNum = '0' + strNum; | |
| } | |
| let centena = Number(strNum.substr(0, 1)); | |
| let dezena = Number(strNum.substr(1)); | |
| let retv = ''; | |
| retv += centenas[centena]; | |
| if(centena === 1 && dezena === 0) { | |
| return 'cem'; | |
| } | |
| if(centena > 0) { | |
| retv += ' e ' | |
| } | |
| if(dezena < 20) { | |
| retv += uni[dezena]; | |
| } else { | |
| retv += dezenas[Math.floor(dezena / 10)]; | |
| unidade = dezena % 10; | |
| if(unidade > 0) { | |
| retv += ' e ' + uni[unidade]; | |
| } | |
| } | |
| return retv; | |
| }; | |
| const numPorExtenso = (n) => { | |
| let strRepr = String(n); | |
| let grupos = []; | |
| while(strRepr) { | |
| let [a, b] = popUnit(strRepr); | |
| grupos.push(b); | |
| strRepr = a; | |
| } | |
| let retv = ''; | |
| let ultima = grupos.findIndex(x=> Number(x) > 0); | |
| let penultima = ultima + grupos.slice(ultima + 1).findIndex(x=> Number(x) > 0) + 1; | |
| let vlrUni = Number(grupos[ultima]); | |
| for(let i = grupos.length - 1; i >= 0; i--) { | |
| let tamGrandeza = Number(grupos[i]); | |
| if(tamGrandeza > 0) { | |
| if(i === 1 && tamGrandeza === 1) { | |
| retv += '' | |
| } else { | |
| retv += subNumPorExtenso(grupos[i]) + ' '; | |
| } | |
| if(i > 0) { | |
| let q = i > 1 ? tamGrandeza > 1 ? gPlu : gSing : ''; | |
| retv += grandezas[i] + q; | |
| if(i === penultima && i !== ultima && (vlrUni < 20 && vlrUni > 0)) { | |
| retv += ' e ' | |
| } else { | |
| if(i > ultima) { | |
| retv += ', '; | |
| } | |
| } | |
| } | |
| } | |
| } | |
| return retv; | |
| } | |
| console.log(numPorExtenso(1997)) |
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