Floats - Soli MVC Documentation

Creating Floats

let pi = 3.14159
let temp = -40.0
let tiny = 0.001
let sci = 2.5e10          # Scientific notation
let typed: Float = 1.5

Round to the nearest integer (0 args) or to a specific number of decimal places.

3.7.round        # 4 (returns int)
3.14159.round(2) # 3.14 (returns float)
2.5.round        # 3

Round up to the nearest integer.

3.2.ceil     # 4
(-3.2).ceil  # -3

Round down to the nearest integer.

3.7.floor    # 3
(-3.7).floor # -4

Truncate toward zero (remove decimal part).

3.7.truncate     # 3
(-3.7).truncate  # -3

Returns the absolute value.

(-3.14).abs  # 3.14
5.0.abs      # 5.0

Returns the square root.

16.0.sqrt    # 4.0
2.0.sqrt     # 1.4142135623730951

Check if the float is zero, positive, or negative.

0.0.zero?        # true
3.14.positive?   # true
(-1.5).negative? # true

Check for special IEEE 754 float states.

3.14.finite?     # true
3.14.infinite?   # false
3.14.nan?        # false

Check if the float is within the given range (inclusive).

3.14.between?(1.0, 5.0)   # true
0.5.between?(1.0, 5.0)    # false

Constrain the float to be within the given range.

15.5.clamp(0.0, 10.0)  # 10.0
(-5.0).clamp(0.0, 10.0) # 0.0

Convert to integer (truncates toward zero).

3.7.to_i     # 3
(-3.7).to_int # -3

Convert to string representation.

3.14.to_s    # "3.14"
(-1.5).to_string  # "-1.5"

Returns the type name as a string.

3.14.class   # "float"

Returns a developer-friendly string representation.

3.14.inspect # "3.14"

Check if the value is of the given type. Supports "float", "numeric", and "object".

3.14.is_a?("float")     # true
3.14.is_a?("numeric")   # true
3.14.is_a?("int")       # false

Floats are never nil and always present.

3.14.nil?      # false
3.14.blank?    # false
3.14.present?  # true