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JavaScript

100JavaScript's Single Number Type
101Number Literals: Decimal, Hex, Octal, Binary
102Scientific Notation (e-notation)
103The Number Constructor
104Number.parseInt and Number.parseFloat
105Number.isNaN vs Global isNaN
106Number.isFinite vs Global isFinite
107Number.isInteger
108Number.isSafeInteger and Safe Integer Range
109Number Constants: MIN_VALUE, MAX_VALUE
110Number Constants: EPSILON
111Number Constants: MIN_SAFE_INTEGER, MAX_SAFE_INTEGER
112Special Values: Infinity and -Infinity
113Special Value: NaN (Not a Number)
114toFixed, toExponential, and toPrecision
115Floating-Point Representation Basics
116Why 0.1 + 0.2 !== 0.3
117Epsilon and Safe Comparison
118Number.MAX_SAFE_INTEGER and MIN_SAFE_INTEGER
119Integer Overflow Beyond Safe Range
120Number.MAX_VALUE and MIN_VALUE
121Infinity and -Infinity
122NaN: Not a Number
123Detecting NaN with Number.isNaN
124Signed Zero: +0 and -0
125Rounding Errors in Financial Calculations
126When to Use BigInt Instead
127Why BigInt Exists: Beyond Number.MAX_SAFE_INTEGER
128Creating BigInt Values
129BigInt Arithmetic Operations
130BigInt and Number Cannot Mix
131Comparison and Equality with BigInt
132BigInt Type Checking and Conversion
133BigInt in JSON and String Representation
134When to Use BigInt
135The Math Object and Its Static Methods
136Rounding: Math.floor, Math.ceil, Math.round, Math.trunc
137Math.abs for Absolute Values
138Math.min and Math.max with Multiple Arguments
139Math.random for Random Number Generation
140Generating Random Integers in a Range
141Math.pow and the Exponentiation Operator
142Math.sqrt and Math.cbrt for Roots
143Trigonometric Functions: sin, cos, tan
144Math Constants: PI, E, and Others

JavaScript

100JavaScript's Single Number Type
101Number Literals: Decimal, Hex, Octal, Binary
102Scientific Notation (e-notation)
103The Number Constructor
104Number.parseInt and Number.parseFloat
105Number.isNaN vs Global isNaN
106Number.isFinite vs Global isFinite
107Number.isInteger
108Number.isSafeInteger and Safe Integer Range
109Number Constants: MIN_VALUE, MAX_VALUE
110Number Constants: EPSILON
111Number Constants: MIN_SAFE_INTEGER, MAX_SAFE_INTEGER
112Special Values: Infinity and -Infinity
113Special Value: NaN (Not a Number)
114toFixed, toExponential, and toPrecision
115Floating-Point Representation Basics
116Why 0.1 + 0.2 !== 0.3
117Epsilon and Safe Comparison
118Number.MAX_SAFE_INTEGER and MIN_SAFE_INTEGER
119Integer Overflow Beyond Safe Range
120Number.MAX_VALUE and MIN_VALUE
121Infinity and -Infinity
122NaN: Not a Number
123Detecting NaN with Number.isNaN
124Signed Zero: +0 and -0
125Rounding Errors in Financial Calculations
126When to Use BigInt Instead
127Why BigInt Exists: Beyond Number.MAX_SAFE_INTEGER
128Creating BigInt Values
129BigInt Arithmetic Operations
130BigInt and Number Cannot Mix
131Comparison and Equality with BigInt
132BigInt Type Checking and Conversion
133BigInt in JSON and String Representation
134When to Use BigInt
135The Math Object and Its Static Methods
136Rounding: Math.floor, Math.ceil, Math.round, Math.trunc
137Math.abs for Absolute Values
138Math.min and Math.max with Multiple Arguments
139Math.random for Random Number Generation
140Generating Random Integers in a Range
141Math.pow and the Exponentiation Operator
142Math.sqrt and Math.cbrt for Roots
143Trigonometric Functions: sin, cos, tan
144Math Constants: PI, E, and Others

← JavaScript

Lesson 123 of 2,723·4. Working with NumbersPro lesson

Detecting NaN with Number.isNaN

Use Number.isNaN to reliably check for NaN without type coercion surprises.

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