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For Versus While in C++
Loops in programming are used to compute a block of code multiple times. Here we will be seeing the difference between two types of loops in the program, For Loop and While Loop.
For Loop
For Loop is a type of repetition control loop which allows the user to loop over the given block of code upto a specific number of times.
Syntax
for(initisation; condition; update){
…code to be repeated
}While Loop
While loop is a type of entry-controlled loop that allows the user to repeatedly execute the given statement till the given condition is true.
Syntax
while(condition){
…code to be repeated
}Difference between For and While Loops
For loop is an interaction controlled loop whereas while is a condition controlled loop.
The condition statement of for loop allows users to add an update statement inside it whereas in while condition only the control expression can be written.
The test condition in for loop is commonly an integer comparison whereas in while the test condition can be any other expression that evaluates to a boolean value.
Code where both the loops can provide different solutions
One case, where both the loops act differently is the body of loop contains a continue statement which is before update statement in while but in for the update statement is present in the initialisation itself.
Example
Program to illustrate the working of our solution:(for loop)
#include<iostream>
using namespace std;
int main(){
cout<<"Displaying for loop working with continue statement\n";
for(int i = 0; i < 5; i++){
if(i == 3)
continue;
cout<<"loop count "<<i<<endl;
}
return 0;
}Output
Displaying for loop working with continue statement loop count 0 loop count 1 loop count 2 loop count 4
Example
Program to illustrate the working of our solution:(while loop)
#include<iostream>
using namespace std;
int main(){
cout<<"Displaying for loop working with continue statement";
int i = 0;
while(i < 5){
if(i == 3)
continue;
cout<<"loop count "<<i<<endl;
i++;
}
return 0;
}Output
Displaying for loop working with continue statementloop count 0 loop count 1 loop count 2
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