C-language loop structure and cyclic control statements

Sometimes we may need to execute the same piece of code multiple times. In general, statements are executed sequentially: The first statement in a function executes first, followed by the second statement, and so on.

Programming languages provide a variety of control structures for more complex execution paths.

The loop statement allows us to execute a statement or group of statements multiple times.

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Own little Practice

Print Count

#include <stdio.h>int main () {int a,sum;printf ("Please enter number A:"), scanf ("%d", &a), sum = 1;do{printf ("*"); sum = sum + 1;} while (sum<=a);}

Top N Odd and

#include <stdio.h>int main () {int s,sum,n,i;printf ("Enter the top N:"), scanf ("%d", &n); s = 0;sum = 1;i = 1;while (i<=n ) {s = s +sum;sum = sum + 2;i = i + 1;} printf (the and of the first n items is:%d. ", s);}

Seeking primes

#include <stdio.h> #include "math.h" int main () {int a,n,i;printf ("Please enter the number to be judged: \ n"), scanf ("%d", &a); n = sqrt (a); for (i=2;i<=n;i=i+1) {if (a%n==0) break;} if (i==n+1) printf ("%d" is a prime number.) ", a); else printf ("%d is not a prime number.) ", a);}

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C-language loop structure and cyclic control statements