Plan: 1 For repetition operator

#include
int main()
{
int i; 
for (int i = 10; i >= 1; i--)
cout << i << " ";
cout << endl;
system ("pause");
return 0;
}

The break function can be applied to any iteration operator. This function ensures that duplication is completed. That is, it passes control from one iteration operator to the next.

The continue function can be applied to any iteration operator. This function ensures that the iteration parameter takes the next value. In other words, the body of repetition ends. This does not end the repetition.

Example 3: Given a natural number n. Create a program that calculates the sum of numbers from one to n.

#include
int main()
{
int n,s = 0;
cout << "n="; cin >> n;
for (int i = 1; i <= n; i++)
s=s+i;
cout << s << endl;
system ("pause");
return 0;
}

Other options for the iteration operator The for iteration operator may not contain expressions in parentheses, but ";" must be

The simplest continuous iteration operator is:
for (;;)
cout << "constant repetition";
If several variables need to be changed synchronously at the same time during the iteration process, they can be separated by commas where necessary in and .


#include
int main()
{
int n;
cout<<"n=";
cin >> n;
for (int i = 1, j = 1; i <= n; i++, j += i)
cout << i << " " << j << endl;
system ("pause");
return 0;
}

If condition operator fulfillment (one-sided selection)

if - else
operators.
Conditional operators
To implement networking in branching algorithms
conditional operator is used.
if
The operator does not confirm any condition
performs networking in the program based on the results of the test [3, p. 34]:
if
() ;
The can be any expression, usually a comparison
will work. If the condition is different from 0 or true,
is executed, otherwise no action is taken if the condition is 0 or false
failed and managed
if
passes from operator to operator (if it
if any). Such a design is also called one-sided selection.
This situation is shown in Figure 2.1 below.