leet-code/triangle.ts at master · egrizq/leet-code · GitHub

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function flipRightTriangle(n: number) {
    for (let i=n-1; i>=0; i--) {
        let data: any = []
        for (let j=i; j>=0; j--) {
            data.push("*")
        }
        console.log(data.join(''))
    }
}

flipRightTriangle(10)

/*
[LOG]: "*****"
[LOG]: "****"
[LOG]: "***"
[LOG]: "**"
[LOG]: "*"
*/

function flipLeftTriangle(n: number) {
    for (let k=0; k<n; k++) {
        let temp: any = []

        for (let j=1; j<=k; j++) {
            temp.push(" ")
        }

        for (let a=n; a>k; a--) {
            temp.push("*")
        }

        console.log(temp.join(" "))
    }
}

flipLeftTriangle(5)

/*
[LOG]: "* * * * *"
[LOG]: "  * * * *"
[LOG]: "    * * *"
[LOG]: "      * *"
[LOG]: "        *"
*/

function leftTriangle(n: number) {
    for (let i=1; i<=n; i++) {
        let temp: any = []

        for (let j=n-i; j>0; j--) {
            temp.push(" ")
        }

        for (let k=0; k<i; k++) {
            temp.push("*")
        }

        console.log(temp.join(""))
    }
}

leftTriangle(5)

/*
[LOG]: "    *"
[LOG]: "   **"
[LOG]: "  ***"
[LOG]: " ****"
[LOG]: "*****"
*/

function rightTriangle(n: number) {
    for (let i=1; i<=n; i++) {
        let data: any = []
        for (let j=0; j<i; j++) {
            data.push("*")
        }
        console.log(data.join(''))
    }
}

rightTriangle(5)

/*
[LOG]: "*"
[LOG]: "**"
[LOG]: "***"
[LOG]: "****"
[LOG]: "*****"
*/