Ruby String To Integer Or Float

The string objects in ruby have several methods to convert the string object into a number.

Ruby string to integer or float.

Converting strings to numbers ruby provides the to i and to f methods to convert strings to numbers. To f will convert the string to an float a floating pont. It turns out that it s not entirely that simple to answer and there are lot of apparently correct ideas that all turn out to fail closer scrutiny. The objects of the float class represents real numbers using the native architecture s double precision floating point representation.

To i will convert the string to an integer. This method returns a string that contains a representation of self as well as a fixed or exponential form of numbering. Usually defaults to 2 2250738585072014e 308. The smallest positive normalized number in a double precision floating point.

Example 123 50 to f 123 5 float 123 50 123 5 however there is a difference when the string is not a valid float. Posted 14 april 2011 in programming finally a technical article this one caused by a seemingly simple question on stack overflow asking how to test if string is a number. An overview of number types. To r will convert the string to a rational number.

Both of these will throw an exception if str is not a valid float integer. To c will convert the string to a complex number. To i converts a string to an integer and to f converts a string to a float. Numeric integer fixnum bignum float complex rational bigdecimal standard library as you can see the numeric class is the parent for all the number classes.

Casting to a float. In this tutorial you ll convert strings to numbers objects to strings strings to arrays and convert between strings and symbols. How to check if a string is numeric. Let s start by taking a look at the class hierarchy of all the number related classes in ruby.

0 0 next float returns the smallest positive floating point number including denormalized numbers. Integer ruby 2 5 0. Ceil ndigits integer or float click to toggle source. If the platform supports denormalized numbers there are numbers between zero and float min.

String click to toggle source.