Back to basics 25 - Valid variable names
Number of digits in an integer
2倍してみよう - ここからスタート！
There are 10 types of people in the world
Find my daddy long leg (No 's')
Vector creation using colon operator
Variance computation (★)
Create logarithmically spaced values (★)
Create a vector of n alternating ones and minus ones (★★)
Create a vector of n alternating ones and zeros (★★)
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