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  2. Nested function - Wikipedia

    en.wikipedia.org/wiki/Nested_function

    Nested functions can be used for unstructured control flow, by using the return statement for general unstructured control flow.This can be used for finer-grained control than is possible with other built-in features of the language – for example, it can allow early termination of a for loop if break is not available, or early termination of a nested for loop if a multi-level break or ...

  3. Numerical linear algebra - Wikipedia

    en.wikipedia.org/wiki/Numerical_linear_algebra

    This is because matrix algorithms frequently contain two nested loops: one over the columns of a matrix A, and another over the rows of A. For example, for matrices A m × n {\displaystyle A^{m\times n}} and vectors x n × 1 {\displaystyle x^{n\times 1}} and y m × 1 {\displaystyle y^{m\times 1}} , we could use the column partitioning ...

  4. Control flow - Wikipedia

    en.wikipedia.org/wiki/Control_flow

    Alternatives to multilevel breaks include single breaks, together with a state variable which is tested to break out another level; exceptions, which are caught at the level being broken out to; placing the nested loops in a function and using return to effect termination of the entire nested loop; or using a label and a goto statement.

  5. Matrix multiplication algorithm - Wikipedia

    en.wikipedia.org/wiki/Matrix_multiplication...

    The naïve algorithm using three nested loops uses Ω(n 3) communication bandwidth. Cannon's algorithm, also known as the 2D algorithm, is a communication-avoiding algorithm that partitions each input matrix into a block matrix whose elements are submatrices of size √ M/3 by √ M/3, where M is the size of fast memory. [28]

  6. MATLAB - Wikipedia

    en.wikipedia.org/wiki/MATLAB

    MATLAB does include standard for and while loops, but (as in other similar applications such as APL and R), using the vectorized notation is encouraged and is often faster to execute. The following code, excerpted from the function magic.m , creates a magic square M for odd values of n (MATLAB function meshgrid is used here to generate square ...

  7. Loop interchange - Wikipedia

    en.wikipedia.org/wiki/Loop_interchange

    Loop interchange on this example can improve the cache performance of accessing b(j,i), but it will ruin the reuse of a(i) and c(i) in the inner loop, as it introduces two extra loads (for a(i) and for c(i)) and one extra store (for a(i)) during each iteration. As a result, the overall performance may be degraded after loop interchange.

  8. For loop - Wikipedia

    en.wikipedia.org/wiki/For_loop

    Fortran's equivalent of the for loop is the DO loop, using the keyword do instead of for, The syntax of Fortran's DO loop is: DO label counter = first , last , step statements label statement The following two examples behave equivalently to the three argument for-loop in other languages, initializing the counter variable to 1, incrementing by ...

  9. Nesting (computing) - Wikipedia

    en.wikipedia.org/wiki/Nesting_(computing)

    Nesting can mean: nested calls: using several levels of subroutines; recursive calls; nested levels of parentheses in arithmetic expressions; nested blocks of imperative source code such as nested if-clauses, while-clauses, repeat-until clauses etc.