intro-js js-assignment-operators.js

js-assignment-operators.js

// = the equal sign is the assignment operator;
var a = 10; // number ten is assigned to variable a;
var b = 20;
var c = 12;
a = c;  // a is 12
console.log("a: " + a);
a = c = b;  // a is 20, c is 20, b is 20
console.log("a: " + a);


// += the plus equal is the addition assignment operator
var a = 10;
console.log("a: " + a);
a += 1;  // a is 11;
console.log("a: " + a);
a = a + 1; // a is 12
console.log("a: " + a);

// -= the minus equal is the subtraction assignment operator
a = 10;
console.log("a:" +a); // a is ten
a -= 1; //a is 9
console.log("a:" +a);
a = a - 1; //a is 8
console.log("a:" +a);