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# How to convert a number to any number base in Ruby

okwudili onyejiaku

### Overview

In Ruby, we can convert any number to any base using the method to_s(). This method requires a parameter that is between 2 and 36. This means we can convert any number to any base from base-2 to base-36.

If no parameter is passed, then the number will be converted to a base-10 value.

### Syntax

num.to_s(base)


### Parameters

num: This is the number that we want to convert.

base: This is the base to which we want to convert num.

### Return value

The returned value is equivalent to the number num, but in the specified base that is passed to the to_s() method.

### Example

# create some numbers
num1 = 10

# convert to different
# bases
a = num1.to_s(2)  # base 2
b = num1.to_s(8)
c = num1.to_s()   # base 10, default
d = num1.to_s(16) # base 16

# print results
puts a  # 1010
puts b  # 12
puts c  # 10
puts d  # a
Convert a number to different number bases in Ruby

### Explanation

• Line 2: We create a number value 10.

• Line 6: We call to_s to convert the number to a number in base-2.

• Line 7: We call to_s to convert the number to a number in base-8.

• Line 8: We call to_s to convert the number to a number in base-10. Notice that we didn’t pass any parameter to the method. It will convert it to base 10 by default.

• Line 9: We call to_s to convert the number to a number in base-16.

• Lines 12–15: We print the results to the console.

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ruby
number
base
conversion
communitycreator

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