Which of the following is the correct way to create a lambda in Ruby?

easy📝 Syntax Q12 of 15

Ruby - Blocks, Procs, and Lambdas

A->(x) { x * 2 }

Bdef lambda(x) x * 2 end

Clambda(x) => x * 2

Dlambda(x) { x * 2 }

Step-by-Step Solution

Solution:

Step 1: Identify valid lambda syntax
In Ruby, lambdas can be created using the arrow syntax ->(params) { code } or lambda { |params| code }.
Step 2: Check each option
lambda(x) { x * 2 }: invalid syntax (lambda keyword expects block with |params|, not parenthesized args). def lambda(x) x * 2 end: method definition, not a lambda. lambda(x) => x * 2: invalid syntax. ->(x) { x * 2 }: correct arrow syntax.
Final Answer:
->(x) { x * 2 } -> Option A
Quick Check:
Arrow syntax ->(x) { ... } creates lambda [OK]

Quick Trick: Use ->(params) { code } or lambda { |params| code } [OK]

Common Mistakes:

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