Ruby - String Operations
Which of these is the correct syntax to get the substring 'gram' from
str = "programming"?Which of these is the correct syntax to get the substring 'gram' from str = "programming"?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Identify substring 'gram' position
'gram' starts at index 3: p(0)r(1)o(2)g(3)r(4)a(5)m(6)...Step 2: Use start index and length syntax
str[3, 4] extracts 4 characters starting at index 3, which is 'gram'.Final Answer:
str[3, 4] -> Option AQuick Check:
Start index + length slicing = correct substring [OK]
Quick Trick: Use str[start, length] for substring extraction [OK]
Common Mistakes:
- Using range with wrong end index
- Confusing length with end index
- Off-by-one errors in slicing
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