C++ Program to Print Right Triangle Pattern with Explanation
C++
Easy
Pattern Printing
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1 min read
145 words
This problem helps you practice core C++ fundamentals in a practical way. It builds intuition around triangle, pattern, right. Let’s break it down step by step so you can implement it confidently.
Problem Statement
Print stars in increasing pattern (right triangle).
Real Life: Understanding row-dependent printing.
Input Format
An integer n (number of rows).
Output Format
Right-angled triangle pattern using *.
Constraints
• n ≥ 1
• Use loops only
Concept Explanation
Stars are printed in increasing order.
Each row prints stars equal to the row number.
This depends directly on the row count.
Step-by-Step Logic
1.Take input n.
2.Loop rows from 1 to n.
3.For each row i:
• Print i stars using an inner loop.
5.After printing stars of a row, move to next line
Code Solution
This explanation is written for learning purposes and to help beginners understand the concept clearly.
void pattern_q2_right_triangle() {
int n = 5;
for(int i = 1; i <= n; i++) {
for(int j = 1; j <= i; j++) {
cout << "* ";
}
cout << endl;
}
}
Common Mistakes
- Misreading input/output format.
- Not handling constraints and edge cases.
- Off-by-one errors in loops.
- Forgetting to reset variables between test cases (if any).
Solution Guide
Problem
Print stars in increasing pattern (right triangle).
Real Life: Understanding row-dependent printing.
Input / Output
Input
An integer n (number of rows).
Output
Right-angled triangle pattern using *.
Constraints
• n ≥ 1
• Use loops only
Explanation
Concept Explanation
Stars are printed in increasing order.
Each row prints stars equal to the row number.
This depends directly on the row count.
Step-by-Step Explanation
1.Take input n.
2.Loop rows from 1 to n.
3.For each row i:
• Print i stars using an inner loop.
5.After printing stars of a row, move to next line
Details
Common Mistakes
- Misreading input/output format.
- Not handling constraints and edge cases.
- Off-by-one errors in loops.
- Forgetting to reset variables between test cases (if any).
Official Solution
void pattern_q2_right_triangle() {
int n = 5;
for(int i = 1; i <= n; i++) {
for(int j = 1; j <= i; j++) {
cout << "* ";
}
cout << endl;
}
}
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