Given a string x, return the sum of all ASCII numbers of all characters.
for example, if x='lala' ('l'-> 108, 'a'->97) then y = 108+97+108+97
Try 1.5.4: Celsius to Fahrenheit
03 - Matrix Variables 2
Deleting an element in a matrix
Volume of a box
Magnitude of a vector
How many complete pizzas
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