2014.8.18for Loop

For Loop

1. Initial status

2. Cyclic Conditions

3. Loop body

4. Status Change

Syntax for (Initial State; cyclic condition; state change)

{

Loop body;

}

Eg:

1 for (int i = 1; i <= 10; i++)2 {3      Console.Write(i);4 }

The output result is

 

1 // sum of all numbers within 100 and 2 int sum = 0; 3 for (INT I = 1; I <= 100; I ++) 4 {5 sum = sum + I; 6} 7 console. writeline (SUM );

1 // There is a monkey and a pile of peaches in the park. Every time I eat ordinary Peaches, I will throw the rest of them to a bad one. On the seventh day, I open my eyes and find that there is only one peach, how many peaches are there in the park at the beginning? 2 int sum = 1; 3 for (INT I = 1; I <7; I ++) 4 {5 sum = (sum + 1) * 2; 6} 7 console. writeline ("there are {0} peaches in the park at the beginning. ", Sum );

1 // a rabbit was born every month from the first 3rd months after birth. After the third month, a rabbit was born every month. If the Rabbit does not die, what is the total number of rabbits in 24th months? 2 int n1 = 1, n2 = 1, num = 1; 3 for (INT I = 3; I <= 24; I ++) 4 {5 num = N1 + N2; // Number of rabbits in the nth month = number of rabbits in the first two months and 6 n1 = n2; 7 n2 = num; 8} 9 console. writeline (Num );

 

1 // use 2 for (INT I = 1; I <= 6; I ++) 3 {4 for (Int J = 1; j <= 6-I; j ++) 5 {6 console. write (""); 7} 8 for (int K = 1; k <= I + I-1; k ++) 9 {10 console. write ("★"); 11} 12 console. Write (" \ n "); 13}

The output result of the above Code is

// Diamond for (INT I = 1; I <= 6; I ++) {for (Int J = 1; j <= 6-I; j ++) {console. write ("") ;}for (int K = 1; k <= I + I-1; k ++) {console. write ("★");} Console. write ("\ n") ;}for (int l = 7; L <= 11; l ++) {for (int m = 1; m <= L-6; M ++) {console. write ("") ;}for (INT n = 1; n <= 2 * (12-l)-1; n ++) {console. write ("★");} Console. Write (" \ n ");}

The above code shows the result and illustration