Extract leading non-zero digit
Generate a vector like 1,2,2,3,3,3,4,4,4,4
Who has power to do everything in this world?
Rounding off numbers to n decimals
Basics: counting digits of a number irrespective of the sign
Remove white spaces at the end of the input string
count upper and lower case characters
Raise each element to the power of its index in a matrix
Product of all elements in an array
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