A conditional phrase used in logical propositions or programming to denote alternatives based on negation.

निषेधात्मक यदि-तब (prastavit yadi tab jo nirodh ke aadharit ho)

English Usage: "You can access the service not-if then the conditions aren’t met."

Hindi Usage: "आप सेवा तक नहीं पहुंच सकते यदि शर्तें पूरी नहीं होतीं।"