CPP For Loop is a loop statement which can be used in various forms to execute a block of code continuously as long as the condition of the loop is true, and stops only when the condition fails. These are:
For Loop :
For loop is used to execute a group of action only for a specified number of times.
Syntax:
for(initialization; condition; increment/decrement)
{
code to be executed till the condition is true;
}
Nested For Loop :
Nested For loop is For loop inside a For loop and so on which is used to run multiple loop conditions.
Syntax:
for(initialization; condition; increment/decrement)
{
for(initialization; condition; increment/decrement)
{
code to be executed till the condition is true;
}
}
Example 1: Example of For loop
#include <iostream.h> using namespace std; int main() { int i; for (i = 0; i <= 10; i++) { cout << i << endl; } return 0; } |
Output
0 1 2 3 4 5 6 7 8 9 10 |
Example 2: Example of Nested For loop
#include <iostream.h> using namespace std; int main() { int i,j; for (i = 1; i <= 10; i++) { cout << i << endl; for (j = 1; j <= i; j++) { cout << j; } cout << endl; } return 0; } |
Output
1 1 2 12 3 123 4 1234 5 12345 6 123456 7 1234567 8 12345678 9 123456789 10 12345678910 |