C#for statements

Loop: You can execute a piece of code repeatedly until the loop condition is not met.
First, the four elements of the cycle: initial conditions, cyclic conditions, state changes, circulation body.
1. Initial conditions: The first state of the cycle.
2. Loop condition: Under what conditions the loop is performed and the condition is not satisfied, the loop terminates.
3. State change: Change the value of the cyclic variable, and ultimately do not meet the cycle conditions, thus stopping the loop.
4. Loop body: The part to be executed repeatedly.

Second, syntax: for syntax.//And While,do...whilte
for (initial condition; cyclic condition; state change)
{
Loop body
}
Attention:
In parentheses after 1.for, three items are separated by semicolons.
Do not add a semicolon after the 2.for parenthesis.
3. Do not write the cycle of death.
Cases:
for (int i=1;i<=10;i++)
{
Console.WriteLine ("Hello");
}

Third, the implementation process:
1. Performing Initial conditions
2. Implementing Cycle Conditions
3. Loop body
4. Status change
5 continue the 2nd step.

Iv. Examples of:
1. Find the number within 100 and 7 related. (Can be divisible by 7, single digit is 7, 10 digits is 7)
for (int i=1;i<=100;i++)
{
if (i% 7 = = 0 | | I% = = 7 | | i/10 = = 7)//Key
{
Console.Write (i + "t");
}
}
2. Display the ASCII code of the computer:
for (int i=0;i<=125;i++)
{
Console.Write (i+ "=" + (char) i+ "\ t");
}

For Loop variant:
Variant one: While loop
int i = 1;//initial condition
for (; I <= 100;)
{
Console.Write (i + "t");
i++;//State Change
}
Equivalent:
int i = 1;//initial condition
while (I <= 100)
{
Console.Write (i + "t");
i++;//State Change
}

Variant two: Dead loop
for (;;)
{
}

V. Nesting of loops.
for (int i=1;i<=10;i++)
{
for (int j=1;j<=20;j++)
{
Console.Write ("★");
}
Console.WriteLine ();
}
When the outer layer is cycled 1 times, the inner layers are completely cycled through.
Homework:
Print to type:
Row I column Ji and j relationship
The
-
*
$
-

for (int i = 1; I <= 5; i++)
{
for (int j = 1; J <= 5; j + +)
{
Console.Write ("#");
}
Console.WriteLine ();
}

J<=i
A
-
-
-

for (int i = 1; I <= 5; i++)
{
for (int j = 1; J <= I; j + +)
{
Console.Write ("#");
}
Console.WriteLine ();
}

J<=6-i
-
-
The
Wuyi

for (int i = 1; I <= 5; i++)
{
for (int j = 1; J <= 6-i; j + +)
{
Console.Write ("#");
}
Console.WriteLine ();
}

---141
---232
--323
-414
505

for (int i = 1; I <= 5; i++)
{
for (int j = 1; J <= (5-i); j + +)
{
Console.Write ("");
}
for (int k = 1; k <= i; k++)
{
Console.Write ("#");
}
Console.WriteLine ();
}

–
---
--
-

for (int i=1;i<=5;i++)
{
for (int j=1;j<= (5-i); j + +)
{
Console.Write ("");
}
for (int t=1;t<= (2*i-1); t++)
{
Console.Write ("#");
}
Console.WriteLine ();
}

C#for statements