Pattern 6

Problem

Geek is very fond of patterns. Once, his teacher gave him a pattern to solve. He gave Geek an integer n and asked him to build a pattern.

Help Geek to build a pattern.

Examples:

Example 1:

Input: 5

Output:
1 2 3 4 5
1 2 3 4
1 2 3 
1 2  
1 

Your task:

You don't need to input anything. Complete the function printTriangle() which takes an integer n as the input parameter and print the pattern.

Constraints:

• $1<= N <= 20$

Solution

Python

def printTriangle(self, N):
    for i in range(N, 0, -1):  
        for j in range(1, i + 1):  
            if j == 1:
                print(j, end='')  
            else:
                print(' ' + str(j), end='')  
        print()  

Java

void printTriangle(int n) {
    for (int i = n; i >= 1; i--) { 
        for (int j = 1; j <= i; j++) { 
            if (j == 1) {
                System.out.print(j);
            } else {
                System.out.print(" " + j); 
            }
        }
        System.out.println(); 
    }
}

C++

void printTriangle(int n) {
    for (int i = n; i >= 1; i--) { 
        for (int j = 1; j <= i; j++) { 
            if (j == 1) {
                cout << j; 
            } else {
                cout << " " << j; 
            }
        }
        cout << endl; 
    }
}

C

void printTriangle(int n) {
    int i, j;
    for (i = n; i >= 1; i--) {
        for (j = 1; j <= i; j++) {
            if (j == 1) {
                printf("%d", j);
            } else {
                printf(" %d", j);
            }
        }
        printf("\n");
    }
}