how to increment value in javascript code example

Example 1: javascript increment

x = 0;
//pre-increment
++x;
//post-increment
x++;

Example 2: how to increment variable value in javascript

var a = 1;
      function increase(){
            var textBox = document.getElementById("text");
            textBox.value = a;
            a++;
      }

Example 3: increment operator in javascript

// Increment
let a = 1;
a++; // Post Increment
++a; // Pre Increment