"In the C and C++ programming languages, the comma operator (represented by the token There is an operator in C called the comma operator. Browse other questions tagged c++ for-loop multiple-conditions or ask your own question. The syntax of a for loop in C++ is − for ( init; condition; increment ) { statement(s); } Here is the flow of control in a for loop − The init … my sentinel value is "-1".

The first case statement checks to see if the value of the variable is equal to 1. @Caleb, honestly I do not believe the question asks why.

i that will increment from 0 to 9 Case statements are used to set different conditions. C For loop. Example explained. So the first statement has affected the loop while the outcome of the following is lots of zeros.Thanks for contributing an answer to Stack Overflow!

My code's while loop has two values in it, a weight and a value. Go through C Theory Notes on Loops … By using our site, you acknowledge that you have read and understand our

The comma operator use to, you can define multiple expressions in for loop… I have tried to modify the conditions in the while loop to everything I can think of but I'm at a loss. I was just revising my C basics and came across a website which had some multiple choice questions where I came across this. As a beginner, reading the second version looks simpler, but I just think the first one is a little cooler... even though they essentially do the same thing. Stack Overflow works best with JavaScript enabled Syntax. You will find that your condition is not && nor || but behaves exactly like if(dst >= 0). site design / logo © 2020 Stack Exchange Inc; user contributions licensed under Based on the conditions, a set of statements can be executed.
A loop is used for executing a block of statements repeatedly until a given condition returns false.

There are two here. Private self-hosted questions and answers for your enterpriseProgramming and related technical career opportunitiesOh well look at that, not what I expected at all! The Overflow Blog For Loop (Multiple Conditions) January 11, 2015 January 29, 2015 by C Programming Tutorial.

You're right; multiple conditions should be joined with && or ||.Five answers, everybody taking the question overly literally and explaining what a comma does, and not a single answer suggesting that this is horribly, horribly broken.The important point here is tat the code in question is incorrect. Last edited on . Easily attend exams after reading these Multiple Choice Questions.

By using our site, you acknowledge that you have read and understand our By clicking “Post Your Answer”, you agree to our To subscribe to this RSS feed, copy and paste this URL into your RSS reader. For example, I want to do for loop with 2 variable i.e. – Caleb May 31 '13 at 14:07 Statement 3 increases a value (i++) each time the code block in the loop … A switch statement can have multiple case conditions. Private self-hosted questions and answers for your enterpriseProgramming and related technical career opportunitiesBad code. By clicking “Post Your Answer”, you agree to our To subscribe to this RSS feed, copy and paste this URL into your RSS reader. I want to check two conditions in one ‘for’ loop. your coworkers to find and share information.

Featured on Meta The Overflow Blog The for statement executes a statement or a block of statements while a specified Boolean expression evaluates to true.. At any point within the for statement block, you can break out of the loop by using the break statement, or step to the next iteration in the loop by using the continue statement. Free 30 Day Trial
The first condition, j>=0, is evaluated but the result is never used. They can affect the loop. Featured on Meta your coworkers to find and share information. In programming, a loop is used to repeat a block of code until the specified condition is met. Syntax of for loop: for (initialization; condition test; increment or decrement) { //Statements to be executed repeatedly } Flow Diagram of For loop @Caleb In what sense? Hence quoting answers it.Which makes it useless in this case -- he first condition check does nothing useful. I came across this piece of code. To further explain, are the conditions evaluated like this:Or is it something else entirely different? For multiple initialization and multiple updation/incremental, we use comma operator(,). Then it evaluates "i <= 5" and uses that, and only that, as the condition for ending the loop.

But many times a scenario comes where we want to increment or decrement two variables instead of one. Sometimes the form is useful for changing a value at the end of a loop before the test is carried out.Thanks for contributing an answer to Stack Overflow! Thanks for the response.-1 Quoting from Wikipedia doesn't answer the question, which is not what does the comma do but rather why is it being used here. I generally use '&&' or '||' to separate multiple conditions in a Surprisingly, if I change the order of the conditions the output varies.Can somebody explain the reason? Statement 1 sets a variable before the loop starts (int i = 0).Statement 2 defines the condition for the loop to run (i must be less than 5).If the condition is true, the loop will start over again, if it is false, the loop will end.. for (C# reference) 06/13/2018; 2 minutes to read +4; In this article. It executes each expression in order and returns the value of the last statement.

This is one of the most frequently used loop in C programming.