Print Star Triangle

Easy

Python

def print_triangle(n):
    for i in range(1,n+1):
        print('*'*i)

Java

public void printTriangle(int n){
    for(int i=1;i<=n;i++){
        StringBuilder sb=new StringBuilder();
        for(int j=0;j<i;j++) sb.append('*');
        System.out.println(sb);
    }
}

Key Insight

'*'*i eliminates inner loop. Java needs explicit inner loop.

Python → Java Differences

'*'*i string multiplication
Java needs inner loop
Python print vs System.out.println

Python

def print_triangle(n):
    for i in range(1,n+1):
        print('*'*i)

Java

public void printTriangle(int n){
    for(int i=1;i<=n;i++){
        StringBuilder sb=new StringBuilder();
        for(int j=0;j<i;j++) sb.append('*');
        System.out.println(sb);
    }
}

Algorithm Steps

1. For each row print i stars

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