How to use a variable within a function and use it in a secondary function? Javascript-CodePudding

How to get a local variabel to be set into a global one and use it in a secondary function? function 1 will be called in HTML initially then function 2 will be called...

function test1(){
  var test1 = 1;
}

function test2(){
  var test2 = test1   3;
}

CodePudding user response：

In order to use the variable "test1" within the "test2" function, you can either pass it as an argument to the "test2" function, or you can make the "test1" variable a global variable by declaring it outside of the "test1" function. Here's an example of both methods:

Method 1: Pass as an argument

function test1(){
  var test1 = 1;
  test2(test1);
}

function test2(test1){
  var test2 = test1   3;
  console.log(test2);
}

Method 2: Declare as a global variable

var test1;

function test1(){
  test1 = 1;
}

function test2(){
  var test2 = test1   3;
  console.log(test2);
}

In both cases, calling the function test1() will set test1 = 1 and test2() will use that value and print 4 to the console.