mdn/js/0_javascript_first_steps/4_basic_math

4_basic_math

dz / mdn / js / 0_javascript_first_steps / 4_basic_math

Summary

Basic math in javascripts, numbers and operators

Node Tree

Nodes

types_of_numbers
content Types of Numbers
children integers, doubles, floats

number_systems
content Number Systems
children octal, binary, hexadecimal

integers
content integers
parents types_of_numbers

floats
content floats
children doubles
parents types_of_numbers

doubles
content doubles
parents floats, types_of_numbers

octal
content octal
parents number_systems

hexadecimal
content hexadecimal
parents number_systems

binary
content Binary
parents number_systems

number_data_type
content One data type for numbers: Number

typeof
content Typeof: checks data type

useful_number_methods
content Useful Number Methods
children string_to_number, toFixed

toFixed
content toFixed(): round number to fixed number of decimal places
parents useful_number_methods

string_to_number
content Passing string to Number() converts to number data type
parents useful_number_methods

arithmetic_operators
content Arithmetic Operators
children operands, operator_precedence, operators

operands
content Operands: numbers involved in arithmetic
parents arithmetic_operators

operator_precedence
content Operator Precedence
parents arithmetic_operators

operators
content Operators
children assignment, comparison, increment_decrement
parents arithmetic_operators

increment_decrement
content Increment/Decrement Operations
parents operators

assignment
content Assignment Operators
parents operators

comparison
content Comparison Operators
children triple_equals_vs_double
parents operators

triple_equals_vs_double
content === tests equality of values AND their datatypes, while == only checks if their values are the same.
parents comparison