// tipo Number
const meuNumero = 3;
const primeiroNumero = 1; const segundoNumero = 2;
const operacaoMatematica = primeiroNumero + segundoNumero;
console.log(operacaoMatematica)
Daí no bash terminal; Yoshio Junior@DESKTOP-OFT7QML MINGW64 ~ $ cd desktop
Yoshio Junior@DESKTOP-OFT7QML MINGW64 ~/desktop $ cd java-script
Yoshio Junior@DESKTOP-OFT7QML MINGW64 ~/desktop/java-script $ node type-number.js
Yoshio Junior@DESKTOP-OFT7QML MINGW64 ~/desktop/java-script $