JavaScript – Operators – Arithmetic – Assignment
Arithmetic operators are used to perform arithmetic between variables and/or values.
Assignment operators are used to assign values to JavaScript variables.
The code:
<!DOCTYPE html>
<html>
<body>
<p>Click the button to calculate x.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction()
{
a=4;
b=2;
// Arithmetic Operators with numbers
addition=a+b; // result 6
subtraction=a-b; // result 2
multiplication=a*b; // result 8
division=a/b; // result 2
modulus=a%b;
increment=++a; // result increment=5 a=5
increment2=a++; // result increment=4 a=5
decrement=--a; // result decrement=3 a=3
decrement2=a--; // result decrement=4 a=3
// Arithmetic Operators with letters
txt1="Hello";
txt2=" World!"; // notice the space before the word
txt3=txt1+txt2; // result "Hello World!"
// Assignment Operators
x=y; // result x=y
x+=y; // result x=x+y
x-=y; // result x=x-y
x*=y; // result x=x*y
x/=y; // result x=x/y
x%=y; // result x=x%y
// Arithmetic Operators with letters and numbers
x=5+5; // result 10
y="5"+5; // result 55 -> IT IS A STRING!
z="Hello"+5; // result "Hello5!"
// Render the first example
document.getElementById("demo").innerHTML=addition;
}
</script>
</body>
</html>
