The forall statement, Computer Networking

Assignment Help:

The FORALL Statement

The FORALL statement allows for more common assignments to sections of an array. A FORALL statement has the general form.

              FORALL ( triplet, ..., triplet,  mask )

                     statement

  where triplet has the general form

                 subscript = lower: upper : step-size

and states a set of indices. step-size is optional. Statement is an pointer or arithmetic assignment and the assignment statement is evaluated for those index values shown by the list of triplets that are not rejected by the optional mask.

Example 7 The following statements set each element of matrix X to the sum of its indices.

 Parallel Programming

 FORALL (i=1:m, j=1:n)     X(i,j) = i+j

and the following statement sets the upper right triangle of  matrix Y to zero .

FORALL (i=1:n, j=1:n, i

Multi-statement FORALL construct:

Multi-statement FORALL is shorthand for the series of single statement FORALLs. The

syntax for FORALL is

FORALL (index-spec-list [,mask]) Body

END FORALL

Nesting of FORALL is allowed.

Example 8

Let a= [2,4,6,8,10], b=[1,3,5,7,9], c=[0,0,0,0,0]

Consider the following program segment

FORALL (i = 2:4) a(i) = a(i-1)+a(i+1) c(i) = b(i) *a(i+1). END FORALL

The computation will be a[2] =a[1]+a[3] =2+6=8 a[3] =a[2]+a[4] =4+8=12 a[4] =a[3]+a[5] = 6+10=16

c[2] = b[2] *a[3] = 3*12=36 c[3] = b[3] *a[4] = 5*16=80

c[4] = b[4] *a[5] =7*10=70

Thus output is

a= [2,8,12,16,10], b=[1,3,5,7,9], c=[0,36,80,70,0]


Related Discussions:- The forall statement

What is exterior gateway protocol, What is EGP (Exterior Gateway Protocol)?...

What is EGP (Exterior Gateway Protocol)? It is the protocol the routers in neighboring autonomous systems use to recognize the set of networks that can be reached within or by

Command to disable cdp on an interface, Recognize the command to disable CD...

Recognize the command to disable CDP on an interface Ans) Router(config-if)# no cdp enable

What is client/server, Clients and Servers are dividing logical entities th...

Clients and Servers are dividing logical entities that work together over a network to accomplish a task. Many systems with very dissimilar architectures that are connected togethe

Urgent pointer - transport layer, Urgent Pointer This 16 bite whic...

Urgent Pointer This 16 bite which is valid  only f the urgent  flag is set is used  when the segment  contains  urgent data. If  defines  the number  that must be  added  t

Programs for implement tools for digital sound, You must write the 6 progra...

You must write the 6 programs described below. All of these are command-line tools that follow the Unix style of passing switches and arguments on the command line. As such, your p

Introduction to performance evaluations, INTRODUCTION In this part, th...

INTRODUCTION In this part, the topic of performance evaluation shows those parameters that are devised to calculate the performances of various parallel systems. Achieving the

What are the concerns of the physical layer, What are the concerns of the P...

What are the concerns of the Physical Layer? Physical layer coordinates the functions needed to transmit a bit stream over a physical medium. a. Physical characteristics of in

command saves the configuration stored in ram to nvram, Which command save...

Which command saves the configuration stored in RAM to NVRAM Ans) copy running-config startup-config is the command which saves the configuration stored in RAM to NVRAM

What is the igp (interior gateway protocol), Any protocol used by an intern...

Any protocol used by an internetwork to exchange routing data within an autonomous system. E.g. RIP, IGRP and OSPF.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd