Predefined symbols in MATLAB
pi
Contains value of πup to 15 significant numbers
i, j
√-1, imaginary number
Inf
Infinity. Represents a very large or a very small number
NaN
Not a Number. Signifies an output that is very large
clock
Represents an array containing six elements- year, month, day, hour, minute, and second
date
Contains the current date like 24-Jul-2010
eps
Represents the smallest difference between two numbers
ans
Stores the result of an output by default
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