What are Loops in C and C++ Programming
Have you ever thought that if you want to display 100 times message like “hello” on screen, or if you want a function/ part of the program to be executed several times, then without typing that much times you can go through Loop for the solution?
Loop in C/C++ is defined as a process of repeating the same task as per the requirement. A counter variable is always present there, and the program executes until the counter variable satisfies the condition. Loops are defined in two main types:
- Entry Controlled Loop
- Exit Controlled Loop
Entry Controlled Loop : As the name suggest, the condition is checked at the beginning of the loop. Example For loop and while loop.
For example,
Syntax in for loop
for ( initializer ; condition ; iteration){
}
//For loop
#include<iostrem>
using namespace std;
int main()
{
int i=0;
for( i=0 ; i<10 ; i++)
{
cout<<”Hello”<<endl;
}
return 0;
}
// while loop
Syntax :
initialization
while ( condition )
{
increment;
}
Example
int i=0;
while ( i < 10 )
{
cout<<”hello”<<endl;
i++;
}
Exit Controlled Loop : Here the condition is checked at the end of the loop.
For example, do – while () loop
Syntax
initialization
do {
iteration
}while (condition);
Even if the condition is false, the expression is executed atleast one time.
For example,
int i = 0;
do {
i++;
cout<<”Hello”<<endl;
} while ( i < 10 )
Infinite Loop
A loop which continues to run forever is known as infinite loop. For example,
for ( ; ; )
{
cout<<”Hello”<<endl;
}
Or
int i = 0;
while ( i ==0 )
{
cout<<”Hello”<<endl;
}
