You want to quickly test a method that doubles a number in IRB. Which code correctly defines and calls it?

hard📝 Application Q8 of 15

Ruby - Basics and Runtime

Adef double(x); x * 2; end; double(5)

Bdef double x x * 2 end double(5)

Cdef double(x) x * 2; double(5)

Ddouble = def(x) x * 2; end; double(5)

Step-by-Step Solution

Solution:

Step 1: Check method definition syntax
def double(x); x * 2; end; double(5) uses correct Ruby syntax with semicolons and 'end'.
Step 2: Confirm method call is correct
double(5) calls the method properly after definition.
Final Answer:
def double(x); x * 2; end; double(5) -> Option A
Quick Check:
Correct method syntax and call in IRB [OK]

Quick Trick: Use def ... end and call method after defining [OK]

Common Mistakes:

Master "Basics and Runtime" in Ruby

9 interactive learning modes - each teaches the same concept differently

Want More Practice?

15+ quiz questions · All difficulty levels · Free

More Ruby Quizzes