级联JS函数-如何将变量从一个函数转移到另一个函数

function function1(variable) {
  // 处理变量
  return processedVariable;
}

function function2(processedVariable) {
  // 处理processedVariable
}

var variable = "Hello";
var processedVariable = function1(variable);
function2(processedVariable);

var variable;

function function1() {
  // 处理变量
  variable = processedVariable;
}

function function2() {
  // 处理processedVariable
}

variable = "Hello";
function1();
function2();

function function1(variable) {
  // 处理变量
  return processedVariable;
}

function function2(processedVariable) {
  // 处理processedVariable
}

var variable = "Hello";
var processedVariable = function1(variable);
function2(processedVariable);