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Level 01: Zahlensysteme
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‎Level_01/Level_1.ipynb‎

Lines changed: 86 additions & 7 deletions
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@@ -504,6 +504,92 @@
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"print(s)"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"Die \"umgekehrte\" Operation geht natürlich auch, aber wir können nicht einfach jeden String in einen Integer umwandeln:"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 6,
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"metadata": {},
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"outputs": [
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{
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"ename": "ValueError",
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"evalue": "invalid literal for int() with base 10: 'abcdef'",
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"output_type": "error",
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"traceback": [
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"\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
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"\u001b[0;31mValueError\u001b[0m Traceback (most recent call last)",
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"\u001b[0;32m/tmp/ipykernel_287561/681081256.py\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[1;32m 1\u001b[0m \u001b[0mx\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"5\"\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 2\u001b[0;31m \u001b[0mint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"abcdef\"\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
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"\u001b[0;31mValueError\u001b[0m: invalid literal for int() with base 10: 'abcdef'"
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]
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}
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],
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"source": [
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"x = int(\"5\")\n",
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"int(\"abcdef\")"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"Die Fehlermeldung weist uns auf ein ganz spannendes Feature hin: Wir können die Basis angeben.\n",
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"Bisher haben wir (standardmäßig) Dezimalzahlen verwendet (Basis 10). Wir können aber z.B. auch Hexadezimalzahlen (Basis 16) verwenden:"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 9,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"11259375\n",
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"0xabcdef\n"
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]
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}
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],
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"source": [
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"x = int(\"abcdef\", 16)\n",
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"print(x)\n",
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"print(hex(x))"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"Analog zu `hex` existieren auch `bin` (binär, Basis 2) und `oct` (oktal, Basis 8).\n",
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"Diese drei sind so häufig, dass sich auch Literale damit formulieren lassen (`0x` für hexadezimal, `0b` für binär, `0o` für oktal):"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 12,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"0o777\n",
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"0b1011\n",
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"0xc0ffee\n"
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]
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}
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],
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"source": [
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"print(oct(0o777))\n",
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"print(bin(0b1011))\n",
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"print(hex(0xc0ffee))"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
@@ -680,13 +766,6 @@
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"source": [
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"import this"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": []
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}
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],
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"metadata": {

‎Level_01/integer.py‎

Lines changed: 0 additions & 21 deletions
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