畫星星蘋果長方形 — nested loop(巢狀迴圈) 範例參考

畫長方形

var content = ""
let count = 5
for _ in 1...count {
   for _ in 1...count {
       content += "🐠"
   }
   content += "\n"
}

第一排最特別

var content = ""
let count = 5
for i in 1...count {
    for _ in 1...count {
        if i == 1 {
            content += "🐟"
        } else {
            content += "🐠"
        }
    }
    content += "\n"
}

畫對角線 \

var content = ""
let count = 5
for i in 1...count {
    for j in 1...count {
        if i == j {
            content += "🐟"
        } else {
            content += "🐠"
        }
    }
    content += "\n"
}

畫對角線 /

var content = ""
let count = 5
for i in 1...count {
    for j in 1...count {
        if i + j == count + 1 {
            content += "🐟"
        } else {
            content += "🐠"
        }
    }
    content += "\n"
}

畫 X，count 只能是奇數

var content = ""
let count = 5
for i in 1...count {
    for j in 1...count {
        if i == j || i + j == count + 1 {
            content += "🐟"
        } else {
            content += "🐠"
        }
    }
    content += "\n"
}

畫十字，count 只能是奇數

var content = ""
let count = 5
let number = (count + 1) / 2
for i in 1...count {
    for j in 1...count {
        if i == number || j == number {
            content += "🐟"
        } else {
            content += "🐠"
        }
    }
    content += "\n"
}

畫 X，count 只能是奇數，交叉的地方顯示特別的魚

var content = ""
let count = 5
let number = (count + 1) / 2
for i in 1...count {
    for j in 1...count {
        if i == number, j == number {
            content += "🐡"
        } else if i == j || i + j == count + 1 {
            content += "🐟"
        } else {
            content += "🐠"
        }
    }
    content += "\n"
}

畫框框

var content = ""
let count = 5
for i in 1...count {
    for j in 1...count {
        if i == 1 || j == 1 || i == count || j == count {
            content += "🐟"
        } else {
            content += "🐠"
        }
    }
    content += "\n"
}

梅花座

var content = ""
let count = 5
for i in 1...count {
    for j in 1...count {
        if (i + j) % 2 == 0 {
            content += "👧🏻"
        } else {
            content += "👦🏽"
        }
    }
    content += "\n"
}

每排顯示不同圖案

搭配 array。

let roles = ["🧛‍♀️", "👻", "🎅", "🧙‍♀️", "🦸‍♀️"]
var content = ""
for role in roles {
    for _ in 1...roles.count {
       content += role
   }
   content += "\n"
}