1880			The operands of this relational operator are expressions of different 'essential type' categories (%1s and %2s).
	Arithmetic type - Balancing

/*PRQA S 1-9999 ++*/
/*PRQA S 1880, 1802, 1822, 4505 --*/

_Bool             boa;
char              pca;
enum E {ONE, TWO} ena;
enum F {UNO, DUE} enb;
int               sia;
unsigned          uia;
float             fta;

void f1880 (void)
{
  if (boa < pca) ;  /* 4505 */
  if (boa < ena) ;  /* 4505 */
  if (boa < sia) ;  /* 4505 */
  if (boa < uia) ;  /* 4505 */
  if (boa < fta) ;  /* 4505 */

  if (pca < ena) ;  /* 1880 */
  if (pca < sia) ;  /* 1880 */
  if (pca < uia) ;  /* 1880 */
  if (pca < fta) ;  /* 1880 */

  if (ena < enb) ;  /* 1880 */
  if (ena < sia) ;  /* 1880 */
  if (ena < uia) ;  /* 1880 */
  if (ena < fta) ;  /* 1802 */

  if (sia < uia) ;  /* 1822 */
  if (sia < fta) ;  /* 1802 */

  if (uia < fta) ;  /* 1802 */
}

See also:

• 1802 The %1s operand (essential type: '%2s') will be implicitly converted to a floating type, '%3s', in this relational operation.
• 1822 The %1s operand is non-constant and 'essentially signed' (%2s) but will be implicitly converted to an unsigned type (%3s) in this relational operation.
• 4505 An expression of 'essentially Boolean' type (%1s) is being used as the %2s operand of this relational operator (%3s).