Binary uses only 0 and 1. Each position is a power of 2 (1, 2, 4, 8, 16…). To convert 13 to binary: 8+4+1 = 1101.
| Dec | Binary | Dec | Binary |
<tr><td class="py-0.5 px-2 text-gray-700">0</td><td class="py-0.5 px-2 text-purple-600">000</td><td class="py-0.5 px-2 text-gray-700">8</td><td class="py-0.5 px-2 text-purple-600">1000</td></tr><tr><td class="py-0.5 px-2 text-gray-700">1</td><td class="py-0.5 px-2 text-purple-600">001</td><td class="py-0.5 px-2 text-gray-700">9</td><td class="py-0.5 px-2 text-purple-600">1001</td></tr><tr><td class="py-0.5 px-2 text-gray-700">2</td><td class="py-0.5 px-2 text-purple-600">010</td><td class="py-0.5 px-2 text-gray-700">10</td><td class="py-0.5 px-2 text-purple-600">1010</td></tr><tr><td class="py-0.5 px-2 text-gray-700">3</td><td class="py-0.5 px-2 text-purple-600">011</td><td class="py-0.5 px-2 text-gray-700">11</td><td class="py-0.5 px-2 text-purple-600">1011</td></tr><tr><td class="py-0.5 px-2 text-gray-700">4</td><td class="py-0.5 px-2 text-purple-600">100</td><td class="py-0.5 px-2 text-gray-700">12</td><td class="py-0.5 px-2 text-purple-600">1100</td></tr><tr><td class="py-0.5 px-2 text-gray-700">5</td><td class="py-0.5 px-2 text-purple-600">101</td><td class="py-0.5 px-2 text-gray-700">13</td><td class="py-0.5 px-2 text-purple-600">1101</td></tr><tr><td class="py-0.5 px-2 text-gray-700">6</td><td class="py-0.5 px-2 text-purple-600">110</td><td class="py-0.5 px-2 text-gray-700">14</td><td class="py-0.5 px-2 text-purple-600">1110</td></tr><tr><td class="py-0.5 px-2 text-gray-700">7</td><td class="py-0.5 px-2 text-purple-600">111</td><td class="py-0.5 px-2 text-gray-700">15</td><td class="py-0.5 px-2 text-purple-600">1111</td></tr>