C Statements and blocks.

Statements

C has three types of statement.

• assignment

• 	= (expression)
  

• selection (branching)

• 	if (expression)
  	else
  	switch
  

• iteration (looping)

• 	while (expression)
  	for (expression;expression;expression)
  	do {block}
  

Blocks

These statements are grouped into blocks, a block is identified by curly brackets...There are two types of block.

• statement blocks

• 	if ( i == j)
          {
            printf("martin \n");
          }
  
  

• The statement block containing the printf is only executed if the i == j expression evaluates to TRUE.
• function blocks

• 	int add( int a, int b)      /* Function definition */
  	{
  	  int c;
  	  c = a + b;
  	  return c;
  	}
  

• The statements in this block will only be executed if the add function is called. Complete function example