![]() ![]() If we only wanted the code to run when the condition is true (i.e. When this condition becomes false, the loop will exit and the program will continue.ĭo….while loops must run at least once, regardless of whether the condition is true or not (as the condition isn’t checked before the code is ran the first time. This loop will continue while the condition, sun=true, is true. In this basic example we’ve told the program to keep the sprinklers set to true (or on) while the sun is shining. Another Exampleįor example in a do….while loop you may have the following condition: Repeating a block of statements where the number of iterations is unknown and is based on other variables or conditions. We know to do this that we have to loop 100 times, there is no requirement for a condition to be attached to the loop. In our example above, this is the way we have used looping – to print the numbers 1 to 100 inclusive. Repeating a block of statements with a specified and previously defined number of iterations to be completed. There are usually a number of different types of loops included in programming languages including for loops, while loops and do….while loops. This number of times could be specified to a certain number, or the number of times could be dictated by a certain condition being met. The purpose of loops is to repeat the same, or similar, code a number of times. However, even programmers with the most basic of experience should understand what you are doing with the for loop. The one possible disadvantage could be that its slightly harder to write and read (from a non-developers perspective). Now, as you can see, the code above is a lot more slick, easier to write and less time consuming. Now, lets have a look what happens to the code if we use a loop, in this case, a for loop. ![]() ![]() Obviously not only is this time consuming, it is also very tedious. Now without loops we would have to do the following: Lets say that we want to print a sequence of numbers. All the examples provided in this article will be in pseudocode. I’ll use some examples to illustrate how your time is saved. Loops can be very useful and can save you, the developer, a lot of time. In fact, all but the most basic of programs are likely to include at least one loop in them. Loops are a fundamental construct for many programs. ![]()
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