vals=[2,4,7] new="{1}{2}{1}".format(vals[0],vals[2],vals[1]) print(new)

Question

Needs reason of output

Answer 1

new="{1}{2}{1}".format(2,7,4)

Inside the Curly brackets we write the index no. Whose value we want,so we will get

new="747"

Answer 2

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Answer 3

Why not using an f-string? It is much more clear and concise, and can do more than other formatting methods.

print(f'{vals[2]}{vals[1]}{vals[2]}')

You don't need placeholders and a format(), it can be done just how it's shown here. If it is used without print, it can generate a string, that looks like the output.

Answer 4

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Answer 5

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Answer 6

In curly brackets index is given so at index 1in vals is 7 and index 2 is 4 and finaly index 1 is 7 so output of code or new="747"