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Print odd and even numbers from 1 to 'n'

This is a simple example of the combined use of cycles ( For in this case) and conditionals.
The first idea is to print all the odd numbers from 1 to n, then the couple, noting that "n" is a predefined value, although it could be a simple modification for the user to enter the number.
we go.

 
 \u0026lt;iostream>   # include using namespace 
 
   std; 
 
   int a, b, c, d; 
 
   int main (void) {
 
 court \u0026lt;\u0026lt;"Printing of odd numbers from 1 to 999" \u0026lt;\u0026lt;endl \u0026lt;\u0026lt; ; endl; 
 system ("pause"); 
  for  (a = 1, a \u0026lt;= 1000; a + +) 
 {
 b = a% 2; 
  if  (b == 1) 
 {
 court \u0026lt;\u0026lt;a \u0026lt;\u0026lt;endl;} 
 
 
} system ("pause"); 
 court \u0026lt;\u0026lt;"Print the even numbers from 1 to 1000" \u0026lt;\u0026lt;Endl \u0026lt;\u0026lt;endl; 
 system ("pause"); 
   for (d = 1, d \u0026lt;= 1000; d + +) {
 
 c = d% 2; 
   if (c = = 0) 
 
 {court \u0026lt;\u0026lt;d \u0026lt;\u0026lt;endl;} 
 
 
} system ("pause"); 
   return 0;}