Additionally, if you ever need to make a change to a number in a calculation, you can use variables instead of actual numbers. It is convenient to use variables when you have a number or expression that repeats. In programming, a variable is a symbol or string that represents a quantity in a mathematical or computational expression. In many programming languages (including Python), a list index starts at 0. This code will output a list of values starting at 3 and finishing at 10, with a step size of 1/2 (Example D).Īs you can see, the final Sqrt command only performed the square root function on the fourth element in the list, changing it from 4 to 2, unlike the previous square root example, where the entire list was changed.īear in mind when using lists in the Wolfram language that the index of a list starts at 1 – in other words, if you want to address the first item in a list, you use the code list]. The first of these methods is the Range function, which autofills a list of numbers: Range Luckily, the Wolfram language has you covered, with a number of ways in which to build lists automatically. However, when you run this code, it is automatically changed to the curly bracket format, so it is usually easier just to use the shorthand notation.īuilding lists by manually entering data is a very long-winded process, and for some applications, it is much better to do this in an automated fashion. The curly brackets are shorthand notation for creating a list the full function for creating a list is: List In the Wolfram language, a list is contained in curly brackets: That said, the three are pretty similar: An array is effectively a list of functions, and a matrix is a list of lists. Lists also are sometimes referred to as arrays or matrices however, in the Wolfram language, lists, arrays, and matrices are three distinct things. Other programming languages use lists as well (e.g., Python). Lists are a fundamental part of the Wolfram language.
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