Editing Octal (section)

===Irrational numbers===
The table below gives the expansions of some common [[irrational number]]s in decimal and octal.
{| class="wikitable"
! rowspan=2 | Number
! colspan=2 | Positional representation
|-
! Decimal
! Octal
|-
| [[Square root of 2|{{sqrt|2}}]] {{small|(the length of the [[diagonal]] of a unit [[Square (geometry)|square]])}}
| {{val|1.414213562373095048}}...
| 1.3240 4746 3177 1674...
|-
| [[Square root of 3|{{sqrt|3}}]] {{small|(the length of the diagonal of a unit [[cube]])}}
| {{val|1.732050807568877293}}...
| 1.5666 3656 4130 2312...
|-
| [[Square root of 5|{{sqrt|5}}]] {{small|(the length of the [[diagonal]] of a 1×2 [[rectangle]])}}
| {{val|2.236067977499789696}}...
| 2.1706 7363 3457 7224...
|-
| {{mvar|[[Golden ratio|φ]]}} {{small|1=(phi, the [[golden ratio]] = {{math|(1+{{radical|5}})/2}})}}
| {{val|1.618033988749894848}}...
| 1.4743 3571 5627 7512...
|-
| {{mvar|[[Pi|π]]}} {{small|(pi, the ratio of [[circumference]] to [[diameter]] of a circle)}}
| {{val|3.141592653589793238462643}}<br>{{val|383279502884197169399375105}}...
| 3.1103 7552 4210 2643...
|-
| {{mvar|[[E (mathematical constant)|e]]}} {{small|(the base of the [[natural logarithm]])}}
| {{val|2.718281828459045235}}...
| 2.5576 0521 3050 5355...
|}