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Input & Output / String Handling & Random Number Functions GapFill
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In order to data, all computers need to be able to temporarily that data so that values can be accessed and changed as the program runs. are locations in memory where the data is stored; each of these has an address so that the computer knows where the data has been stored and where to find it. When programs are created we name variables using an so that we can read the program and make sense of what the variables are used for.
In addition, each variable will have a which defines what operations can be performed on that data type and how much space is needed to store the variable.
Every high-level language where variables are declared will state explicitly the identifier and the data type but some languages, like Python, assume the data type based on the data to the variable, e.g. shoe_size = 5.5 will be assumed to be the real or float data type as it has a fractional part. Similarly a variable for a telephone number will always be a data type not a numerical data type as no arithmetic operations would be performed on this type of variable. A string can contain zero or more characters, usually up to a maximum of 255, another data type is or Character which allows a single character, letter, digit, punctuation mark or symbol to be stored. The other two main data types are , which are whole numbers and which has the value True or False or 0 or 1.
A computer system may need inputs to run a program, one of the main methods of obtaining that data is through user input via the , the results of running a program and processing data into information is commonly displayed to the user via a computer display like a monitor or touch screen.