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What is your favorite number?
Is math your favorite subject?
JavaScript
number
object
ROBERT S. PUGAYAN JR.
JavaScript
number
object
ROBERT S. PUGAYAN JR.
The JavaScript number object enables
you to represent a numeric value. It
may be integer or floating-point.
JavaScript number object follows IEEE
standard to represent the floating-point
numbers.
• By the help of Number() constructor,
you can create number object in
JavaScript. For example:
1. var n=new Number(value);
• If value can't be converted to
number, it returns NaN(Not a
Number) that can be checked by
isNaN() method.
JavaScript
number
object
ROBERT S. PUGAYAN JR.
You can direct assign a number to a variable
also. For example:
<script>
var x=102;//integer value
var y=102.7;//floating point value
var z=13e4;//exponent value, output:
130000
var n=new Number(16);//integer value
by number object
document.write(x+" "+y+" "+z+" "+n);
</script>
JavaScript
Number
Constants
Constant Description
MIN_VALUE returns the largest
minimum value.
MAX_VALUE returns the largest
maximum value.
POSITIVE_INFINITY returns positive infinity,
overflow value.
NEGATIVE_INFINITY returns negative infinity,
overflow value.
NaN represents "Not a Number"
value.
JavaScript
Number
Methods
Methods Description
isFinite() It determines whether the given value
value is a finite number.
isInteger() It determines whether the given value
value is an integer.
parseFloat() It converts the given string into a
floating-point number.
parseInt() It converts the given string into an
integer number.
toExponential() It returns the string that represents
exponential notation of the given
number.
toFixed() It returns the string that represents a
number with exact digits after a
decimal point.
toPrecision() It returns the string representing a
number of specified precisions.
toString() It returns the given number in the
form of string.
What have you learned?
01:Identify
what is being
describe.
Constant Description
returns the largest
minimum value.
returns the largest
maximum value.
returns positive infinity,
overflow value.
returns negative infinity,
overflow value.
represents "Not a
Number" value.
01:Identify
what is being
describe.
Methods Description
It determines whether the given value is a finite number.
It determines whether the given value is an integer.
It converts the given string into a floating-point number.
It converts the given string into an integer number.
It returns the string that represents exponential notation of the
given number.
It returns the string that represents a number with exact digits after
after a decimal point.
It returns the string representing a number of specified precisions.
It returns the given number in the form of string.

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JavaScript number object.pptx

  • 1. What is your favorite number? Is math your favorite subject?
  • 3. JavaScript number object ROBERT S. PUGAYAN JR. The JavaScript number object enables you to represent a numeric value. It may be integer or floating-point. JavaScript number object follows IEEE standard to represent the floating-point numbers. • By the help of Number() constructor, you can create number object in JavaScript. For example: 1. var n=new Number(value); • If value can't be converted to number, it returns NaN(Not a Number) that can be checked by isNaN() method.
  • 4. JavaScript number object ROBERT S. PUGAYAN JR. You can direct assign a number to a variable also. For example: <script> var x=102;//integer value var y=102.7;//floating point value var z=13e4;//exponent value, output: 130000 var n=new Number(16);//integer value by number object document.write(x+" "+y+" "+z+" "+n); </script>
  • 5. JavaScript Number Constants Constant Description MIN_VALUE returns the largest minimum value. MAX_VALUE returns the largest maximum value. POSITIVE_INFINITY returns positive infinity, overflow value. NEGATIVE_INFINITY returns negative infinity, overflow value. NaN represents "Not a Number" value.
  • 6. JavaScript Number Methods Methods Description isFinite() It determines whether the given value value is a finite number. isInteger() It determines whether the given value value is an integer. parseFloat() It converts the given string into a floating-point number. parseInt() It converts the given string into an integer number. toExponential() It returns the string that represents exponential notation of the given number. toFixed() It returns the string that represents a number with exact digits after a decimal point. toPrecision() It returns the string representing a number of specified precisions. toString() It returns the given number in the form of string.
  • 7. What have you learned?
  • 8. 01:Identify what is being describe. Constant Description returns the largest minimum value. returns the largest maximum value. returns positive infinity, overflow value. returns negative infinity, overflow value. represents "Not a Number" value.
  • 9. 01:Identify what is being describe. Methods Description It determines whether the given value is a finite number. It determines whether the given value is an integer. It converts the given string into a floating-point number. It converts the given string into an integer number. It returns the string that represents exponential notation of the given number. It returns the string that represents a number with exact digits after after a decimal point. It returns the string representing a number of specified precisions. It returns the given number in the form of string.