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Primitive datatypes

• int with (+), (*), (/), (%), (<), etc.
• float with same operators and cos, exp, etc.
• char such as 'x' with int:chat->int and char:char->int

int 'a';; // 97
char 98;; // 'b'

Exercises:

1. How to pass from '1' to 1 ?
2. How to pass from 'a' to 'A' ?