![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=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)
![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=aHR0cHM6Ly9pbnN0YWdyYW0uZmRzYTItMS5mbmEuZmJjZG4ubmV0L3YvdDUxLjcxODc4LTE1LzY4NDk3MzUxNl8xOTc2MTkwNDI5OTI2ODQzXzI3NDk0OTM4MTM3MTg2Mzg4MDlfbi5qcGc/c3RwPWRzdC1qcGdfZTE1X3R0NiZfbmNfaHQ9aW5zdGFncmFtLmZkc2EyLTEuZm5hLmZiY2RuLm5ldCZfbmNfY2F0PTExMSZfbmNfb2M9UTZjWjJnRUs1V2lrNEVmQjRHMzRRalZmOXMwdFJoaGFoQ2xyaVl0aXpBSldkWEJsTk1pMEF6SHVZMzdnZ3Z2T1JadE42cDQmX25jX29oYz1FdF8zdmVLTDRzRVE3a052d0ZtQ05UTyZfbmNfZ2lkPWczQmFSVFh3U0xReE4zSlFJaERBUncmZWRtPUFQVTg5RkFCQUFBQSZjY2I9Ny01Jm9oPTAwX0FmNE5aTzFkQ3U5ZjFHOEFmQkdpeHptVjNJWl9ya2xBMkJUemxTTHFzSjdnQ1Emb2U9NkEwRENCNjImX25jX3NpZD1iYzBjMmM=)
![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=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)

![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=aHR0cHM6Ly9pbnN0YWdyYW0uZmRzYTItMS5mbmEuZmJjZG4ubmV0L3YvdDUxLjcxODc4LTE1LzY4OTA0MTU4MF8yMDYzNDkzMDY3ODU0MzI4XzIwNTk2MjAxMjA5MDI3MjMwMjlfbi5qcGc/c3RwPWRzdC1qcGdfZTE1X3R0NiZfbmNfaHQ9aW5zdGFncmFtLmZkc2EyLTEuZm5hLmZiY2RuLm5ldCZfbmNfY2F0PTEwNCZfbmNfb2M9UTZjWjJnRUs1V2lrNEVmQjRHMzRRalZmOXMwdFJoaGFoQ2xyaVl0aXpBSldkWEJsTk1pMEF6SHVZMzdnZ3Z2T1JadE42cDQmX25jX29oYz02Ym1ITmVaZzJ1WVE3a052d0h6VVNpcyZfbmNfZ2lkPWczQmFSVFh3U0xReE4zSlFJaERBUncmZWRtPUFQVTg5RkFCQUFBQSZjY2I9Ny01Jm9oPTAwX0FmNXRpdWFRRU9wOUxQbjR0aGJ0bUF5ejdYUzA0V3dBc3c2RHhPdkJlNVo1aWcmb2U9NkEwREQzOUYmX25jX3NpZD1iYzBjMmM=)
![🧐 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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)

![𝙀𝙭𝙥𝙡𝙖𝙣𝙖𝙩𝙞𝙤𝙣 ⬇️ 1) arr = [10, 20, 30] • You created a list named arr with three elements: Index 0 → 10 Index 1 → 20 Index 2 → 30 2) arr.append([40, 50]) • The append() method adds o](https://image.pictame.com/img/681955024_17922715731327436_8597205621023501453_n.jpg?hash=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)
![🔎 Explanation 1) arr = [10,20,30] • You created a list named arr with three elements: • Index 0 → 10 • Index 1 → 20 • Index 2 → 30 2) i = 0 • Variable i is initialized with the value 0.](https://image.pictame.com/img/671125857_17922018804327436_3400205081689884339_n.jpg?hash=aHR0cHM6Ly9pbnN0YWdyYW0uZmRzYTItMS5mbmEuZmJjZG4ubmV0L3YvdDUxLjgyNzg3LTE1LzY3MTEyNTg1N18xNzkyMjAxODgwNDMyNzQzNl8zNDAwMjA1MDgxNjg5ODg0MzM5X24uanBnP3N0cD1kc3QtanBnX2UxNV90dDYmX25jX2h0PWluc3RhZ3JhbS5mZHNhMi0xLmZuYS5mYmNkbi5uZXQmX25jX2NhdD0xMDQmX25jX29jPVE2Y1oyZ0VLNVdpazRFZkI0RzM0UWpWZjlzMHRSaGhhaENscmlZdGl6QUpXZFhCbE5NaTBBekh1WTM3Z2d2dk9SWnRONnA0Jl9uY19vaGM9QmVtN194b0h6NVFRN2tOdndHd3V1cDAmX25jX2dpZD1nM0JhUlRYd1NMUXhOM0pRSWhEQVJ3JmVkbT1BUFU4OUZBQkFBQUEmY2NiPTctNSZvaD0wMF9BZjV4UU42SDM2bDNuQmJxaWs5cG1ibGVLRWtLS0tjazFDV0tWZVd2cURLWm13Jm9lPTZBMERCMDJGJl9uY19zaWQ9YmMwYzJj)
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