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48 lines
1.4 KiB
48 lines
1.4 KiB
2 years ago
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#!/bin/sh
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# To make this script executable, use the command: chmod +x 21_parentheses.sh
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# To run the script, use the command: ./11_parentheses.sh
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echo "This spell will teach you the basics of differentiating between similar parenthetical syntax in POSIX-compliant Bash"
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echo "To study the code of the examples, please use the command: cat 21_parentheses.sh"
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# Using $() command substitution
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echo "Using command substitution with $()"
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current_date=$(date)
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echo "Today's date is: $current_date"
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# Using $(()) arithmetic expansion
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echo "Using arithmetic expansion with $(())"
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num1=5
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num2=3
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result=$((num1 + num2))
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echo "5 + 3 = $result"
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# Using string list
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echo "Using string list with \"\""
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ingredients="Dragon's blood Unicorn hair Phoenix feather"
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echo "Ingredients: $ingredients"
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# Using array
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echo "Using array with ()"
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ingredients=("Dragon's blood" "Unicorn hair" "Phoenix feather")
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echo "Ingredients: ${ingredients[@]}"
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# Using [] test command
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echo "Using test command with []"
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string="Dragon's blood"
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if [ "$string" = "Dragon's blood" ]; then
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echo "The string is Dragon's blood"
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else
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echo "The string is not Dragon's blood"
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fi
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# Using [[]] test command
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echo "Using test command with [[]]"
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string="Dragon's blood"
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if [[ "$string" = "Dragon's blood" ]]; then
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echo "The string is Dragon's blood"
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else
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echo "The string is not Dragon's blood"
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fi
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echo "Spell cast successfully."
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