Definition Operator
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Evaluates a and assigns the result to x. A regular definition is valid after it has been defined (to its right and below it).
: (Colon)
x is any valid variable or function name, matrix of names, or subscripted variable name. x cannot be a number or an expression.
a is any expression that can be evaluated. If a contains other variables, then those variables must also be defined either with the regular definition operator above the definition of x, or globally anywhere in the worksheet.
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