Python でリスト内包表記を使用する方法

# 1. Traditional for-loop way to build a list
squares_loop = []
for x in range(1, 6):
    squares_loop.append(x**2)
print("Loop squares:", squares_loop)

# 2. List comprehension way (same outcome)
squares_comp = [x**2 for x in range(1, 6)]
print("Comp squares:", squares_comp)

# 3. Filtering elements with an 'if' clause (even numbers only)
evens = [n for n in range(1, 11) if n % 2 == 0]
print("Even numbers:", evens)

# 4. String modifications using comprehensions
names = ["alice", "bob", "charlie"]
caps = [name.capitalize() for name in names]
print("Capitalized:", caps)

Loop squares: [1, 4, 9, 16, 25]
Comp squares: [1, 4, 9, 16, 25]
Even numbers: [2, 4, 6, 8, 10]
Capitalized: ['Alice', 'Bob', 'Charlie']