0
Add your answer:
Earn +20 pts
What are the similarities between if else and switch case in c program?
A switch-case statement is used to select between multiple values for a single variable. Like having a case for 1 2 and 3 for an integer. An If-else statement is used for evaluating an expression to either true or false.
What does mean selection in c program?
selection Also called a decision, one of the three basic logic structures in computerprogramming. The other two logic structures are sequence and loop.In a selection structure, a question is asked, and depending on the answer, the program takes one of two courses of action, after which the program moves on to the next event.This structure is sometimes referred to as an if-then-else because it directs the program to perform in this way: If Condition A is True then perform Action X else perform Action Y.All logic problems in programming can be solved by forming algorithms using only the three logic structures, and they can be combined in an infinite number of ways. The more complex the computing need, the more complex the combination of structures.
Can a while statement end in a semicolon?
Yes. A while statement ends in a statement...while (expression) statement...and that statement can be a null statement, a single statement, or a block of statements. In the case of the block of statements, there is also a set of braces surrounding them...while (expression);while (expression) statement;while (expression) {statement1;statement2;...statementN;}In the case where the body of the statement is null, there is no body. This is often done while taking advantage of side effects. For instance, to copy a string you could use...char *strcpy (char *pszDestination, char *pszSource) {char *pszTemp = pszDestination;while ((*pszDestination++ = *pszSource++) != '\0');return pszTemp;}...this works because the post-increment (++) operator has higher precedence than the dereference (*) operator, and because the assignment (=) operator has the value of the assignment, which is compared using the not equal (!=) operator against the string terminator null.Note, carefully, the inner parentheses. They are needed because != has higher precedence than =, and you want it the other way around. Also, some compilers will let you eliminate the != '\0' terms and the inner parentheses, but that is not portable, and most compilers will warn you about assignment in a conditional expression.In the case of a single statement you could use...i= -1;while (++i < argc) printf ("%d %s\n", i, argv[i]);...here the while statement also ends in a semicolon.The case of the block of statements is not shown, because it seems to be understood from the context of the question.
The break statement is required in the default case of a switch selection structure?
Ends the case statement. Without it, any code after where the break; is supposed to be will get executed as well until it does encounter a break; or the end of the switch.Code Example:char cTest = 'a';switch(cTest) {case 'a':/* Code here gets executed. */case 'b': //* Code here gets executed. */case 'c':/* Code here gets executed. */break;case 'd':/* Code here won't be executed. */default:/* Code here won't be executed. */}
When should a switch statement be used?
switch is a loop which is used for checking various conditions and print corresponding matter.switch(a)//where a is that whose condition you have to check.#includemain(){char a;printf("enter a char.");scanf("%c",&a);switch(a){case 'a':printf("vowel");break;case 'e':printf("vowel");break;case 'i':printf("vowel");break;case 'o':printf("vowel");break;case 'u':printf("vowel");break;default:printf("consonent");}}
What are the similarities between if else and switch case in c program?
A switch-case statement is used to select between multiple values for a single variable. Like having a case for 1 2 and 3 for an integer. An If-else statement is used for evaluating an expression to either true or false.
What does mean selection in c program?
selection Also called a decision, one of the three basic logic structures in computerprogramming. The other two logic structures are sequence and loop.In a selection structure, a question is asked, and depending on the answer, the program takes one of two courses of action, after which the program moves on to the next event.This structure is sometimes referred to as an if-then-else because it directs the program to perform in this way: If Condition A is True then perform Action X else perform Action Y.All logic problems in programming can be solved by forming algorithms using only the three logic structures, and they can be combined in an infinite number of ways. The more complex the computing need, the more complex the combination of structures.
Can a while statement end in a semicolon?
Yes. A while statement ends in a statement...while (expression) statement...and that statement can be a null statement, a single statement, or a block of statements. In the case of the block of statements, there is also a set of braces surrounding them...while (expression);while (expression) statement;while (expression) {statement1;statement2;...statementN;}In the case where the body of the statement is null, there is no body. This is often done while taking advantage of side effects. For instance, to copy a string you could use...char *strcpy (char *pszDestination, char *pszSource) {char *pszTemp = pszDestination;while ((*pszDestination++ = *pszSource++) != '\0');return pszTemp;}...this works because the post-increment (++) operator has higher precedence than the dereference (*) operator, and because the assignment (=) operator has the value of the assignment, which is compared using the not equal (!=) operator against the string terminator null.Note, carefully, the inner parentheses. They are needed because != has higher precedence than =, and you want it the other way around. Also, some compilers will let you eliminate the != '\0' terms and the inner parentheses, but that is not portable, and most compilers will warn you about assignment in a conditional expression.In the case of a single statement you could use...i= -1;while (++i < argc) printf ("%d %s\n", i, argv[i]);...here the while statement also ends in a semicolon.The case of the block of statements is not shown, because it seems to be understood from the context of the question.
Could you use char variablewith switch?
But of course.
What is the purpose of Continue and break statement in C?
The break statement is frequently used to terminate the processing of a particular case within a switch statement. Lack of an enclosing iterative or switch statement generates an error.Within nested statements, the break statement terminates only the do, for, switch, or whilestatement that immediately encloses it. You can use a returnor goto statement to transfer control elsewhere out of the nested structure.This example illustrates the break statement:#include int main() { char c; for(;;) { printf_s( "\nPress any key, Q to quit: " ); // Convert to character value scanf_s("%c", &c); if (c == 'Q') break; } } // Loop exits only when 'Q' is pressed
The break statement is required in the default case of a switch selection structure?
Ends the case statement. Without it, any code after where the break; is supposed to be will get executed as well until it does encounter a break; or the end of the switch.Code Example:char cTest = 'a';switch(cTest) {case 'a':/* Code here gets executed. */case 'b': //* Code here gets executed. */case 'c':/* Code here gets executed. */break;case 'd':/* Code here won't be executed. */default:/* Code here won't be executed. */}
When should a switch statement be used?
switch is a loop which is used for checking various conditions and print corresponding matter.switch(a)//where a is that whose condition you have to check.#includemain(){char a;printf("enter a char.");scanf("%c",&a);switch(a){case 'a':printf("vowel");break;case 'e':printf("vowel");break;case 'i':printf("vowel");break;case 'o':printf("vowel");break;case 'u':printf("vowel");break;default:printf("consonent");}}
What is switch case?
switch (expression){case constant-value1:statementsbreak [optional];case constant-value2:statementsbreak [optional];...default:statements;}
How to find the size of dynamically allocated object using pointer?
Hi, The following statement will give the size. (char*)(ptr+1)-(char*)(ptr) Kalyan.S
How do you use char in switch statement?
public class NewClass { public static void main(String[] arg) { char grade = 'b'; switch (grade) { case 'a' : System.out.println("Great Work!"); break; case 'b' : System.out.println("Good Job!"); break; case 'c' : System.out.println("Maybe Next Time!"); break; case 'd' : System.out.println("Try Again!"); break; case 'f' : System.out.println("No Comment!"); break; } } }
The statement char ch equals 'z' would store in ch?
The statement char ch = 'z'; would store the character 'z' in the variable ch. This means that the variable ch would hold the value 'z'.
Creating a program using switch statement and if and else statement?
Not that difficult... int main (int argc, char **argv) { if (argc==1) printf ("No arguments\n"); else printf ("%d arguments\n", argc-1); goto END; END: return 0; }
