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If-then-else flow diagram A nested if–then–else flow diagram. In computer science, conditionals (that is, conditional statements, conditional expressions and conditional constructs) are programming language constructs that perform different computations or actions or return different values depending on the value of a Boolean expression, called a condition.
In this example, s is unambiguously executed when a is true and b is true, but one may interpret s2 as being executed when a is false (thus attaching the else to the first if) or when a is true and b is false (thus attaching the else to the second if). In other words, one may see the previous statement as either of the following expressions:
Shannon–Fano–Elias coding produces a binary prefix code, allowing for direct decoding. Let bcode(x) be the rational number formed by adding a decimal point before a binary code. For example, if code(C) = 1010 then bcode(C) = 0.1010. For all x, if no y exists such that
For example, with 6 lines of code, it is possible to demonstrate a random network image viewer using Flickr as the source. [1] The system utilizes the Microsoft Visual Studio IDE to provide auto-completion and context-sensitive help. Basic-256 is an easy-to-use version of BASIC designed to teach anybody the basics of computer programming.
For example, in higher-order programming, one can pass functions as arguments to other functions and functions can be the return value of other functions (such as in macros or for interpreting). This style of programming is mostly used in functional programming , but it can also be very useful in object-oriented programming .
The code example above shows how the compiler can statically address the reliability of whether some_attribute will be attached or detached at the point it is used. Notably, the attached keyword allows for an "attachment local" (e.g. l_attribute ), which is scoped to only the block of code enclosed by the if-statement construct.
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The following example defines a procedure that applies a function (specified as a parameter) to each element of an array: PROC apply = (REF [] REAL a, PROC (REAL) REAL f): FOR i FROM LWB a TO UPB a DO a[i] := f(a[i]) OD. This simplicity of code was unachievable in ALGOL 68's predecessor ALGOL 60.