C++ course (sixth section)

C++ course(sixth section)

Break & Continue Statements

A break and continue statement alters the flow of control 
The break statement, when executed in a switch structure, provides an immediate exit from the switch structure 
The break statement can be used in while, for, and do...while loops 
When the break statement executes in a repetition structure, it immediately exits from these structures.

The break statement is typically used for two purposes: 
1. To exit early from a loop 
2. To skip the remainder of the switch structure 
After the break statement executes, the program continues to execute with the first statement after the structure 
The use of a break statement in a loop can eliminate the use of certain (flag) variables.

The continue statement is used in while, for, and do-while structures 
When it is executed in a loop, it skips the remaining statements and proceeds with the next iteration of the loop 
In a while and do-while structure, the expression (loop-continue test) is evaluated immediately after the continue statement 
In a for structure, the update statement is executed after the continue statement, and then the loop condition executes.

Examples:

1)
for (int x=1;x<=5; x++) 
if (x!=2)
cout<<x<<“\t”;
else
break;

 cout<<x<<endl;

Output:

  1 2

2)

for (int x=1;x<=5; x++) 
if (x!=2)
cout<<x<<“\t”;
else
continue;
cout<<x<<endl;
Output:

1 3 4 5 6

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