Dynamic typing vs strong typing in Ruby - Hands-On Comparison

Understanding Dynamic Typing vs Strong Typing in Ruby

📖 Scenario: Imagine you are building a simple calculator program that can add numbers or concatenate words. Ruby lets you use the same variable for different types of data because it uses dynamic typing. But it also checks types strictly when you try to do operations that don't make sense, showing strong typing.

🎯 Goal: You will create variables with different types, try to add them, and see how Ruby handles dynamic and strong typing.

📋 What You'll Learn

Create variables with different types (integer and string)

Create a variable to hold a sum or concatenation

Try to add variables of the same type

Try to add variables of different types and observe the error

💡 Why This Matters

🌍 Real World

Understanding how Ruby handles types helps avoid bugs when working with user input, calculations, or text processing.

💼 Career

Many Ruby jobs require clear understanding of dynamic and strong typing to write reliable and error-free code.

1

Create variables with different types

Create a variable called number and set it to the integer 10. Then create a variable called text and set it to the string "10".

Ruby

# Create variables number and text with values 10 and "10"
# Your code here

Need a hint?

Use = to assign values. Strings need quotes.

2

Create a variable to hold the result

Create a variable called result and set it to 0 as a starting point.

Ruby

number = 10
text = "10"
# Create a variable result and set it to 0
# Your code here

Need a hint?

Initialize result with 0 to prepare for addition.

3

Add variables of the same type

Set result to the sum of number plus 20. Then set result to the concatenation of text plus "20".

Ruby

number = 10
text = "10"
result = 0
# Add number and 20, assign to result
# Then add text and "20", assign to result
# Your code here

Need a hint?

Use + to add numbers or join strings.

4

Try to add variables of different types and observe error

Try to set result to number plus text. Then print result. This will cause an error because Ruby is strongly typed and does not allow adding integer and string directly.

Ruby

number = 10
text = "10"
result = 0
result = number + 20
result = text + "20"
# Try to add number and text, assign to result
# Then print result
# Your code here

Need a hint?

Ruby will raise a TypeError because it cannot add integer and string directly.