Question

Peer Interaction: Loops You've worked hard to understand the different types of loops in C++. For this interaction requirement, create a tutorial that will help a "new" programmer understand the difference between a while loop and a for loop. Target audience for this tutorial should be first semester programming student. The tutorial must include fundamental concept information and supportive code blocks. Once you have completed your tutorial, please review and respond/interact with at least 3 other student tutorials.

Answer 1

For Loop C++:
Loops are basically used when we need to execute a block of statement multiple times until a condition is satisfied, for example we need to print 1 to 100 so we will set a variable as 1 and loop till the variable is 100 increment by 1 every iteration.

In c++ we have loops such as for loop and while loop
For Loop:
Syntax of for loop:
for(initialization; condition;increment/decrement){
code to execute
}

steps in which a for loop is executed is
first step is the initialization where the variable is initialized, and this happens only once in a for loop, in the second step the condition in the loop is executed for each iteration, if the condition is satisfied and if the condition is false then the statement in the loop does not execute and loop terminates and the control get tranfered to the next statement after for loop.
step 3 is after every execution of the loop body increment or decrement happens, after this the condition in the second step is again re-evaluated and the loop continues if the condition is satisfied.

Example of a for loop
for(int i=0;i<100;i++){
cout<<i<<endl;
}
this loop prints 0 to 99 on the screen.

While loop:
Syntax of a while loop:
while(condition){
code block of while loop
}

In a while loop the condition in the while loop is executed first and if the condition is satisfied or gets true then the loop body executes and loop body executes until the condition is true, when condition is false then control is tranfered to the next statement of the while loop. It is important to use increment or decrement statement inside while loop so that the loop variable gets changed in every iteration and after some point the condition gets false and if we do not provide increment or decrement then the loop becomes an infinite loop and never terminates.

Example of a while loop
int i=0
while(i<100){
cout<<i<<endl;
i++;
}
this loop will also print 0 to 99 incrementing by 1 on every line.

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