Floyd's triangle

floydTriangule.c

#include <stdio.h>
#include <stdlib.h>

int main(){
    
    int x, lineFinalNumber, previousLineFinalNumber;
    
    lineFinalNumber = 0;
    previousLineFinalNumber = 1;
    
    scanf("%d", &x);

    for (int N = 1; N <= x; N++) {
        lineFinalNumber = lineFinalNumber + N; // factorial de soma
        
        for(; previousLineFinalNumber <= lineFinalNumber; previousLineFinalNumber++) {
            if (previousLineFinalNumber != lineFinalNumber) {
                printf("%d", previousLineFinalNumber);
            }

            if (previousLineFinalNumber == lineFinalNumber) {
                printf("%d\n", previousLineFinalNumber);
                previousLineFinalNumber = lineFinalNumber;
            }
        }
    }
    
    return 0;
}

// Input = 6;

// Output:
// 1
// 23
// 456
// 78910
// 1112131415
// 161718192021