

![𝙀𝙭𝙥𝙡𝙖𝙣𝙖𝙩𝙞𝙤𝙣 🧐 • string[1] → second character of "hello" → 'e' • value[3] → fourth character of "12345" → '4' • 'e' + '4' → concatenates into "e4" 👉 Output: e4 ........................](https://image.pictame.com/img/690081932_26916827711304713_4986059595610522533_n.jpg?hash=aHR0cHM6Ly9pbnN0YWdyYW0uZmN2dDEtMi5mbmEuZmJjZG4ubmV0L3YvdDUxLjcxODc4LTE1LzY5MDA4MTkzMl8yNjkxNjgyNzcxMTMwNDcxM180OTg2MDU5NTk1NjEwNTIyNTMzX24uanBnP3N0cD1kc3QtanBnX2UxNV90dDYmX25jX2h0PWluc3RhZ3JhbS5mY3Z0MS0yLmZuYS5mYmNkbi5uZXQmX25jX2NhdD0xMDUmX25jX29jPVE2Y1oyZ0hWRWFKcjdHU1l3NDJSR19sU0FXMGw2aUtKaXl1QVVhRjZfSmk0MWMxRmdyYkIwb3NDM2puQlROSkFTdFpWdWl3Jl9uY19vaGM9WHRzQ1VoemxGaGtRN2tOdndITEczUW4mX25jX2dpZD1WOGdIc1NSRE45TmV4VVJXbXFfUFhRJmVkbT1BUFU4OUZBQkFBQUEmY2NiPTctNSZvaD0wMF9BZjV6RVdFQjRjam5ZVDRhQjJWRmp1Z2lUcVZmMzBjZGNSbG1MX3ZSanpWZnpnJm9lPTZBMEY2QzA3Jl9uY19zaWQ9YmMwYzJj)
![𝙀𝙭𝙥𝙡𝙖𝙣𝙖𝙩𝙞𝙤𝙣⬇️ • numbers list → [2, 4, 6] is the starting list of values. • Empty list → squares = [] prepares a place to store results. • For loop → goes through each number in numbers.](https://image.pictame.com/img/684973516_1976190429926843_2749493813718638809_n.jpg?hash=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)
![𝙀𝙭𝙥𝙡𝙖𝙣𝙖𝙩𝙞𝙤𝙣 ⬇️ • x = [1] creates a list [1]. • y = x makes y point to the same list object as x. •℅x = x + [2] builds a new list [1, 2] and reassigns x to it. • Because reassignment doe](https://image.pictame.com/img/698751329_1944656249509178_8320897085392411021_n.jpg?hash=aHR0cHM6Ly9pbnN0YWdyYW0uZmN2dDEtMi5mbmEuZmJjZG4ubmV0L3YvdDUxLjcxODc4LTE1LzY5ODc1MTMyOV8xOTQ0NjU2MjQ5NTA5MTc4XzgzMjA4OTcwODUzOTI0MTEwMjFfbi5qcGc/c3RwPWRzdC1qcGdfZTE1X3R0NiZfbmNfaHQ9aW5zdGFncmFtLmZjdnQxLTIuZm5hLmZiY2RuLm5ldCZfbmNfY2F0PTEwMiZfbmNfb2M9UTZjWjJnSFZFYUpyN0dTWXc0MlJHX2xTQVcwbDZpS0ppeXVBVWFGNl9KaTQxYzFGZ3JiQjBvc0Mzam5CVE5KQVN0WlZ1aXcmX25jX29oYz1IbXU2ajJUTVZrUVE3a052d0d0MFQzMiZfbmNfZ2lkPVY4Z0hzU1JETjlOZXhVUldtcV9QWFEmZWRtPUFQVTg5RkFCQUFBQSZjY2I9Ny01Jm9oPTAwX0FmNjdreHRnOElyNlVlSzZ6bzJjVEdzdzJ6VVh3cDVtSFcyQjZWazl3cDlObFEmb2U9NkEwRjRBRDAmX25jX3NpZD1iYzBjMmM=)

![𝗘𝘅𝗽𝗹𝗮𝗻𝗮𝘁𝗶𝗼𝗻 🧐 1) Empty list • arr = [] creates an empty list. It has no elements inside. 2) Truthiness of lists • In Python, collections like lists, tuples, sets, and dictionaries ha](https://image.pictame.com/img/685786135_1763549908386210_194809400815311771_n.jpg?hash=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)

![𝙀𝙭𝙥𝙡𝙖𝙣𝙖𝙩𝙞𝙤𝙣 ⬇️ • You start with nums = [1, 2, 3, 4, 5, 6]. • The loop uses nums[:], which is a copy of the list. This is important because you’re removing items from the original list whi](https://image.pictame.com/img/689041580_2063493067854328_2059620120902723029_n.jpg?hash=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)
![🧐 𝙀𝙭𝙥𝙡𝙖𝙣𝙖𝙩𝙞𝙤𝙣 1) data = [10, 20, 30, 40] You created a list named data with four elements: • Index 0 → 10 • Index 1 → 20 • Index 2 → 30 • Index 3 → 40 So initially: [10, 20, 30,](https://image.pictame.com/img/684046087_1701883324272162_6631543611906567339_n.jpg?hash=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)
![𝙀𝙭𝙥𝙡𝙖𝙣𝙖𝙩𝙞𝙤𝙣 ⬇️ 1) x = [1, 2] • You created a list named x with two elements: • Index 0 → 1 • Index 1 → 2 So initially : [1, 2] 2) x.append(3) • The append() method adds one ite](https://image.pictame.com/img/685648479_985771831059879_2477534334931501980_n.jpg?hash=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)

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