Java Script Notes For Professionals

Java Script Notes For Professionals.

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Using a Variable.

var number1 = 5; number1 = 3;
Here, we defined a number called "number1" which was equal to 5. However, on the second line, we changed the value to 3.
To show the value of a variable, we log it to the console or use window.alert():
console.log(number1); // 3 window.alert(number1); // 3
To add, subtract, multiply, divide, etc., we do like so:
numberl = numberl +5; //3+5=8
numberl = numberl - 6; // 8 - 6 = 2
var number2 = numberl * 16; // 2 (times) 70 = 20
var number3 = number2 / number1; // 20 (divided by) 2 = 70;
We can also add strings which will concatenate them, or put them together.
For example: var myString = "I am a " + "string!"; // "I am a string!"




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