java-logic-patterns/Pattern20.java at main · mayurrogheliya/java-logic-patterns · GitHub

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public class Pattern20{
    public static void main(String[] args){
        int n = 1;
        for(int i=1; i<5; i++){
            for(int j=1; j<=i; j++){
                System.out.print(n + " ");
                n++;
            }
            System.out.println();
        }
    }
}