while ( Tese expression)
{
Body of the loop;
}
Statement-x;

An if statement contains another if statement is called nested if. The nested can have one of the following three forms.
1. If nested inside if part
2. If nested inside else part
3. If nested inside both if part and else part.

An iteration (or looping) is a sequence of one or more statements that are repeatedly executed until a condition is satisfied. These statements are also called as control flow statements.

The set of statements that are executed again and again is called the body of the loop.

The flow of control jumps from one part of the code to another segment of code. Program statements that cause such jumps are called as "Control flow"

#include <iostream>
using namespace std;
int main()
{
for (int -21; i <31; i++)
cout << "value of i:"<<<i<<< endl;
return 0;
}
Output
Value of i: 21
Value of i: 22
Value of i: 23
Value of i: 24
Value of i: 25
Value of i: 26
Value of i: 27
Value of i: 28
Value of i: 29
Value of i: 30

Output:
2 4 6 8 10.

The selection statement means the statements are executed depends upon a condition. If a condition is true, a true block (a set of statements) is executed, otherwise a false block is executed. This statement is also called decision statement or selection statement because it helps in making decision about which set of statements are to be executed.
Types: (i) Two way branching, (ii) Multiway branching.

The goto statement is a control statement which is used to transfer the control from one place to another place without any condition in a program.
The syntax of the goto statement is;

The switch statement is a multi-way branch statement. It provides an easy way to dispatch execution to different parts of code based on the value of the expression. The switch statement replaces multiple if-else sequence.
The syntax of the switch statement is;
switch(expression)
{
case constant 1:
statement(s);
break;
case constant 2:
statement(s);
break;
.
.
.
.
default:
statement(s);
}

a=(x>=10)? m + 5:m;

#include <iostream>
using namespace std;
#include <math.h>
int main()
{
int x, n;
float sum= 0;
cout<<"Enter the value for x:";
cin>>x;
cout<<"Enter the number of terms";
cin>>n;
for (int i=0; i<n; i++)
sum = sum + Pow(x,i);
cout<<"Sum="<< Sum<<endl;
cin.get();
return 0;
}

#include <iostream>
using namespace std;
int main()
{
int a1, b1 lem, ged-1, p;
cout << "\n Enter 1st no:";
cin>>a1;
cout << "\n Enter 2nd no:";
cin >> b1;
p=a1*b1;
for (int i = al; i<-p; i++)
if (i%al == 0) && (i%b1 == 0)
{
1cm=i;
break;
}
cin.get():
cout << "L.C.M. =" <<lcm<<endl;
gcd=p/LCM;
cout<<"G.C.D="<< ged;
cin.get():
return 0;
}

Control statements are statements that alter the sequence of flow of instructions.
Types of control statements:
1. Selection statement
The selection statement means the statement (s) executed, depends upon a condition. If a condition is true, a true block (a set of statements) is executed otherwise a false block is executed. This statement is also called decision statement or selection statement because it helps in making decision about which set of statements are to be executed.

2. Iteration (or looping) statement
An iteration (or loop) is a sequence of one or more statements that are repeatedly executed until a condition is satisfied. These statements are also called as control flow statements. It is used to reduce the length of code to reduce the time to execute program and takes less memory space.