a = '60.950'
b = a.to_f
puts a # => 60.950
puts b # => 60.95
I want to display three digits after the decimal point everytime. How can I force 0 at the end of b?
每次我都想在小数点后显示三位数。我怎么能在b的末尾强制0 ?
2 个解决方案
#2
4
Use the mother of the formatting methods, such as String#% or printf or sprintf, which is Kernel#format
使用格式化方法的母亲，如字符串#%或printf或sprintf，这是内核#格式。
puts format('%.3f', 0)
The others refer to this, and the Kernel#format documentation has the full documentation tables.
其他的引用了这个，内核#格式文档有完整的文档表。
#1
#2
4
Use the mother of the formatting methods, such as String#% or printf or sprintf, which is Kernel#format
使用格式化方法的母亲，如字符串#%或printf或sprintf，这是内核#格式。
puts format('%.3f', 0)
The others refer to this, and the Kernel#format documentation has the full documentation tables.
其他的引用了这个，内核#格式文档有完整的文档表。