Define the for loop, Computer Engineering

Assignment Help:

The for Loop

The for loop works well where the number of iterations of the loop is known before the loop is entered. The head of the loop consists of three parts separated by semicolons.

  • The first is run before the loop is entered. This is usually the initialization of the loop variable.
  • The second is a test, the loop is exited when this returns false.
  • The third is a statement to be run every time the loop body is completed. This is usually an increment of the loop counter.

The example is a function which calculates the average of the numbers stored in an array. The function takes the array and the number of elements as arguments.

float average(float array[], int count)

{      float total = 0.0;

int i;

for(i = 0; i < count; i++)

total += array[i];

return(total / count);

 }

The for loop ensures that the correct number of array elements are added up before calculating the average.

However The three statements at the head of a for loop usually do just one thing each, any  of  them  can  be  left  blank.  A  blank  first  or  last  statement  will  mean  no initialisation or running increment. A blank comparison statement will always be treated as true. This will cause the loop to run indefinitely unless interrupted by some other means. This might be a return or a break statement.

It is also possible to squeeze several statements into the first or third position, separating them with commas. This allows a loop with more than one controlling variable. The example below illustrates the definition of such a loop, with variables hi and lo starting at 100 and 0 respectively and converging.

for (hi = 100, lo = 0; hi >= lo; hi--, lo++)

The for loop is extremely flexible and allows many types of program behaviour to be specified simply and quickly.

 


Related Discussions:- Define the for loop

Differentiate between intranet and internet, Differentiate between intranet...

Differentiate between intranet and internet Some comparisons between intranet and internet include: -  INTERNET is INTERnational NETwork -  An INTRANET is INTernal Restri

Develop a calculator in masm, Assignment:  develop a calculator in MASM. ...

Assignment:  develop a calculator in MASM. Text chapters covered:  1 through 4, 5.4, 5.5, 6.3, 7.4 You will develop a "calculator" algorithm in MASM using reverse-polish nota

C, "Super ASCII", if it contains the character frequency equal to their asc...

"Super ASCII", if it contains the character frequency equal to their ascii values. String will contain only lower case alphabets (''a''-''z'') and the ascii values will starts from

Hazard, how to calculate delay for hazard?

how to calculate delay for hazard?

Write about TSR, Write about TSR TPA also holds TSR (terminate and stay...

Write about TSR TPA also holds TSR (terminate and stay resident) programs which remain in memory in an active state until activated by a hot-key sequence or another event like

Explain about wide area network, Q. Explain about Wide Area Network? Wi...

Q. Explain about Wide Area Network? Wide Area Network (WAN) usually refers to a network, which covers a large geographical area as well as use communications subnets (circuits)

Determine about the security policy, Determine about the Security Policy ...

Determine about the Security Policy In the United States, the government has a separate organisation looking after the security measures and providing guidelines to all departm

Loosely coupled systems, Loosely Coupled Systems These systems do not d...

Loosely Coupled Systems These systems do not distribute the global memory because shared memory concept gives rise to the difficulty  of memory conflicts, which in turn slows d

What is drive, Any data storage device. This having of  your CD-ROM drive, ...

Any data storage device. This having of  your CD-ROM drive, hard disk drive and floppy disk drive.

Higher order predicate logic - artificial intelligence, Higher Order Predic...

Higher Order Predicate Logic: In first order predicate logic, we are allowed to quantify over objects only. If we let  ourselves  to  quantify  over  predicate  or  function  s

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