When is a "switch" statement better than multiple "if" statements?

switch statement is generally best to use when you have more than two conditional expressions based on a single variable of numeric type. For instance, rather than the code if (x == 1) printf(“x is equal to one.\n”); else if (x == 2) printf(“x is equal to two.\n”); else if (x == 3) printf(“x is equal to three.\n”); else printf(“x is not equal to one, two, or three.\n”); the following code is easier to read and maintain: switch (x) { case 1: printf(“x is equal to one.\n”); break; case 2: printf(“x is equal to two.\n”); break; case 3: printf(“x is equal to three.\n”); break; default: printf(“x is not equal to one, two, or three.\n”); break; } Notice that for this method to work, the conditional expression must be based on a variable of numeric type in order to use the switch statement. Also, the conditional expression must be based on a single variable. For instance, even though the following if statement contains more than two conditions, it is not a candidate for using a switch statement because it is based on string comparisons and not numeric comparisons: char* name = “Lupto”; if (!stricmp(name, “Isaac”)) printf(“Your name means ‘Laughter’.\n”); else if (!stricmp(name, “Amy”)) printf(“Your name means ‘Beloved’.\n “); else if (!stricmp(name, “Lloyd”)) printf(“Your name means ‘Mysterious’.\n “); else printf(“I haven’t a clue as to what your name means.\n”) read less

In case of we have to check one variable and compare it's value with list of values of same then and then we can use switch case. for example create simple calculator using c programming. we requires one variable for operation like addition, subtraction, multiplication and division. we can tell the user to input the value 1 for +, 2 for - , 3 for * and 4 for /. and then we can compare that variable's value to the list of for cases, case 1, case 2, case 3 , case 4 and finally default case if none of other case is matched. We create this program using if...else if statement or switch case. If program like which day is today. then also we can use switch case. 1 for Monday ....7 for Sunday enter your choise compare by using switch(var) to different cases from case 1 to 7 and default. Break statement is always needed while using switch case. if there is no break statement in cases then all cases will be executed. read less