December 23 Loop statement (for)

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First, the features of the FOR Loop statement:

1. Initial conditions: The first state of the cycle.

2, Cycle conditions: Under what conditions, not satisfied is terminated.

3, state change: Change the value of the loop variable.

4. Loop body: The part to be executed repeatedly.

All for loop instructions are inseparable from these.

Second, for the form and use of the loop:

The form of a loop:

1, (1), for (initial condition ; cyclic condition ; State change)

int i;
for (i = 1; i <=; i++)
{
Console.Write (i+ "\ t");
}//Result output number 1 to 100

(2), for (; cycle conditions ;)

int i=1;
for (; I <= 100;)
{
Console.Write (i+ "\ t");

i++;
}//result is also output number 1 to 100

(3), for (;;)

int i=1;
for (;;)
{
Console.Write (i+ "\ t");

i++;
}//program is a dead loop program

Use of loops:

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");
}

Three, the attention matters:

1. The parentheses behind the for is separated by semicolons by three items.

2, for the back without a semicolon .

3. Do not write the cycle of death.

Iv. Nesting for loops:

int i,j;
for (i = 1; I <= 5; i++)
{
for (j = 1; J <= 5; j + +)
{
Console.Write ("*");
}
Console.WriteLine ();
}//Program output 25 *, horizontal 5, vertical 5.

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First, the features of the FOR Loop statement:

1. Initial conditions: The first state of the cycle.

2, Cycle conditions: Under what conditions, not satisfied is terminated.

3, state change: Change the value of the loop variable.

4. Loop body: The part to be executed repeatedly.

All for loop instructions are inseparable from these.

Second, for the form and use of the loop:

The form of a loop:

1, (1), for (initial condition ; cyclic condition ; State change)

int i;
for (i = 1; i <=; i++)
{
Console.Write (i+ "\ t");
}//Result output number 1 to 100

(2), for (; cycle conditions ;)

int i=1;
for (; I <= 100;)
{
Console.Write (i+ "\ t");

i++;
}//result is also output number 1 to 100

(3), for (;;)

int i=1;
for (;;)
{
Console.Write (i+ "\ t");

i++;
}//program is a dead loop program

Use of loops:

1. Convert the number into ASCII code;

Three, the attention matters:

1. The parentheses behind the for is separated by semicolons by three items.

2, for the back without a semicolon .

3. Do not write the cycle of death.

Iv. Nesting for loops:

int i,j;
for (i = 1; I <= 5; i++)
{
for (j = 1; J <= 5; j + +)
{
Console.Write ("*");
}
Console.WriteLine ();
}//Program output 25 *, horizontal 5, vertical 5.

December 23 Loop statement (for)