Ruby Float round() method with example

round() is a float class method which return a float value rounded to the nearest value with n digits decimal digits precision.

Syntax: float.round()

Parameter: float value as argument

Return: Float value rounded to nearest precision
If precision is -ve : integer with at least ndigits.abs trailing zeros
If ndigits is +ve : a floating-point number, otherwise integer

Example #1 :

# Ruby code for round() method

# declaring float value
a = 0.767

# declaring float value
b = 2999.011

# rounding the float value
puts "rounding a : #{a.round}\n\n"

# rounding the float value
puts "rounding b : #{b.round}\n\n"

Output :

rounding a : 1

rounding b : 2999

Example #2 :

# Ruby code for round() method

# declaring float value
a = 0.767

# declaring float value
b = 2999.011

# declaring float value
c = 2.0000

# rounding the float value
puts "round a : #{a.round(2)}\n\n"

# rounding the float value
puts "round b : #{b.round(-2)}\n\n"

# rounding the float value
puts "round c : #{c.round(0)}\n\n"

Output :

round a : 0.77

round b : 3000

round c : 2

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