Wolfram provides an official for free. You can download it directly from:
Lena had never been good with numbers. In school, equations swam before her eyes like disoriented fish. So when her new job required her to analyze a mountain of climate data, she nearly quit on the spot. mathematica tutorial pdf
(That site offers a book in both web and PDF form, titled "An Elementary Introduction to the Wolfram Language" by Stephen Wolfram.) Wolfram provides an official for free
That night, Lena opened the software and stared at the blank notebook. A blinking cursor mocked her. She typed 2+2 and pressed Shift+Enter. The answer appeared: 4 . She laughed. Maybe this wasn't so bad. mathematica tutorial pdf