Chapter4

DeitelC/Chapter4/NaturalNumberArithmetic.c

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+#include <stdio.h>
+
+int main(void) {
+    int i = 0, total = 0;
+    puts("Enter an integer!");
+    if(scanf("%d", &i)) {
+        for(int sum = 0; sum <= i; sum++) {
+            total += sum;
+        }
+        printf("Total sum: %d\n", total);
+        total = 0;
+        for(int sum = 0; sum * sum <= i * i; sum++) {
+            int pow = sum * sum;
+            total += pow;
+        }
+        printf("Sum of squares: %d\n", total);
+        total = 0;
+        for(int sum = 0; sum * sum * sum <= i * i * i; sum++) {
+            int pow = sum * sum * sum;
+            total += pow;
+        }
+        printf("Sum of cubes: %d\n", total);
+        } else {
+            puts("Enter valid integer!");
+        }
+}

DeitelC/Chapter4/factorial1to5.c

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+#include <stdio.h>
+
+int main(void) {
+    puts("Factorial 1 to 5: ");
+    double sum = 1;
+    for(double i = 1; i <= 20; i++) {
+        sum *= i;
+        printf("The %0.lf! are: %0.lf\n", i, sum);
+    }
+    return 0;
+}

DeitelC/Chapter4/trianglePrinting.c

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+#include <stdio.h>
+
+int main(void) {
+    int start = 10;
+    for(int i = 1; i <= start; i++) {
+        for(int j = 0; j <= i; j++){
+            printf("%s", "*");
+        }
+    }
+    printf("\n");
+}