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[ C Language Examples](#) Creating triangle patterns. ## Example - Using * Symbol #includeint main(){int i, j, rows; printf("Enter number of rows: "); scanf("%d",&rows); for(i=1; i<=rows; ++i){for(j=1; j<=i; ++j){printf("* "); }printf("n"); }return 0; } ** ** * ** * * ** * * * * ## Example - Using Numbers #includeint main(){int i, j, rows; printf("Enter number of rows: "); scanf("%d",&rows); for(i=1; i<=rows; ++i){for(j=1; j<=i; ++j){printf("%d ",j); }printf("n"); }return 0; } 11 21 2 31 2 3 41 2 3 4 5 ## Example - Using Letters #includeint main(){int i, j; char input, alphabet = 'A'; printf("Enter an uppercase letter: "); scanf("%c",&input); for(i=1; i<= (input-'A'+1); ++i){for(j=1;j<=i;++j){printf("%c", alphabet); } ++alphabet; printf("n"); }return 0; } A B B C C C D D D D E E E E E ## Example - Inverted Triangle #includeint main(){int i, j, rows; printf("Enter number of rows: "); scanf("%d",&rows); for(i=rows; i>=1; --i){for(j=1; j<=i; ++j){printf("* "); }printf("n"); }return 0; } * * * * ** * * ** * * * ** ## Example - Inverted Triangle with Numbers #includeint main(){int i, j, rows; printf("Enter number of rows: "); scanf("%d",&rows); for(i=rows; i>=1; --i){for(j=1; j<=i; ++j){printf("%d ",j); }printf("n"); }return 0; } 1 2 3 4 51 2 3 4 1 2 31 21 ## Example - Pyramid #includeint main(){int i, space, rows, k=0; printf("Enter number of rows: "); scanf("%d",&rows); for(i=1; i<=rows; ++i, k=0){for(space=1; space<=rows-i; ++space){printf(""); }while(k != 2*i-1){printf("* "); ++k; }printf("n"); }return 0; } * * * * * * * * * * * * * * * ** * * * * * * * * ## Example - Number Pyramid #includeint main(){int i, space, rows, k=0, count = 0, count1 = 0; printf("Enter number of rows: "); scanf("%d",&rows); for(i=1; i<=rows; ++i){for(space=1; space<= rows-i; ++space){printf(""); ++count; }while(k != 2*i-1){if(count<= rows-1){printf("%d ", i+k); ++count; }else{ ++count1; printf("%d ", (i+k-2*count1)); } ++k; }count1 = count = k = 0; printf("n"); }return 0; } 1 2 3 2 3 4 5 4 3 4 5 6 7 6 5 45 6 7 8 9 8 7 6 5 ## Example - Inverted Pyramid #includeint main(){int rows, i, j, space; printf("Enter number of rows: "); scanf("%d",&rows); for(i=rows; i>=1; --i){for(space=0; space<rows-i; ++space)printf(""); for(j=i; j<= 2*i-1; ++j)printf("* "); for(j=0; j<i-1; ++j)printf("* "); printf("n"); }return 0; } * * * * * * * * * * * * * * * * * * * * * * * * * ## Example - Pascal's Triangle #includeint main(){int rows, coef = 1, space, i, j; printf("Enter number of rows: "); scanf("%d",&rows); for(i=0; i<rows; i++){for(space=1; space<= rows-i; space++)printf(""); for(j=0; j<= i; j++){if(j==0 || i==0)coef = 1; else coef = coef*(i-j+1)/j; printf("%4d", coef); }printf("n"); }return 0; } 1 1 1 1 2 1 1 3 3 1 1 4 6 4 1 1 5 10 10 5 1 ## Example - Floyd's Triangle #include#define N 10 int main(){int i,j,l; for(i=1,j=1;i<=N;i++){for(l=1;l<=i;l++,j++)printf("%5d",j); printf("n"); }return 0; } 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 [ C Language Examples](#)