Getting the number of decimal places: Difference between revisions

</pre>

=={{header|Sidef}}==

<lang ruby>func number_of_decimals(n, limit = 1e5) {

var prec = Num(Num!PREC)>>2

var prev = ''

n = Number(n) if !n.kind_of(Number)

loop {

var str = n.as_dec(prec)

if (prev == str) {

return (str.contains('.') ? str.substr(str.index('.')+1).len : 0)

}

prev = str

prec *= 2

return Inf if (prec > limit)

}

}

var list = [

9, 12.345, "12.3450", "12.345e53",

12.34555555555555555555, 0.1234567890987654321,

Num.pi, 1/3, 1.5**63

]

list.each {|n|

var c = number_of_decimals(n)

say "Number of decimals: #{'%3s' % c} Number: #{n}"

}</lang>

{{out}}

<pre>

Number of decimals: 0 Number: 9

Number of decimals: 3 Number: 12.345

Number of decimals: 3 Number: 12.3450

Number of decimals: 0 Number: 12.345e53

Number of decimals: 20 Number: 12.34555555555555555555

Number of decimals: 19 Number: 0.1234567890987654321

Number of decimals: 188 Number: 3.14159265358979323846264338327950288419716939938

Number of decimals: Inf Number: 0.333333333333333333333333333333333333333333333333

Number of decimals: 63 Number: 124093581919.6489476978273736503801880082242803382541751489