C basics _ note _ 1, note _ 1

C basics _ note _ 1, note _ 1

Define Variables

Int I;

Yes.

Int I, num;

Assign value. c must first define the variable and then assign value.

Num = 0;

Loop

For (I = 1; I <= 0; I ++)

{

Printf ("% d \ n", I); # It is similar to python usage.

}

Loop while

While (I <= 10)

{

Printf ("% d \ n", I );

I ++;

}

You can also write it like this.

While (1)

{

If (I> 10)

{

Break;

}

Printf ("% d \ n", I );

I ++;

}

The following is a complete example.

# Include <stdio. h>

Int main ()

{

Int I, num;

Num = 0;

While (1)

{

If (I> 10)

{

Break;

}

Sum = sum + I;

I ++;

}

Printf ("% d \ n", sum );

}

# The include header file is used to call the library, but I don't think it is necessary to remember it, just like the python import. Check the record when using it or Baidu