The control statement that allows us to make a decision from the number of choices is called a switch, or more correctly a switch-case-default, since these three keywords go together to make up the control statement. They most often appear as follows: The integer expression following the keyword switch is any C expression that will … Read more
There is a minor difference between the working of while and do-while loops. This difference is the place where the condition is tested. The while tests the condition before executing any of the statements within the while loop. As against this, the do-while tests the condition after having executed the statements within the loop The … Read more
In some programming situations we want to take the control to the beginning of the loop, bypassing the statements inside the loop, which have not yet been executed. The keyword continue allows us to do this. When continue is encountered inside any loop, control automatically passes to the beginning of the loop A continue is … Read more
The keyword break allows us to do this. When break is encountered inside any loop, control automatically passes to the first statement after the loop. A break is usually associated with an if Example: Write a program to determine whether a number is prime or not. A prime number is one, which is divisible only … Read more
The versatility of the computer lies in its ability to perform a set of instructions repeatedly. This involves repeating some portion of the program either a specified number of times or until a particular condition is being satisfied This repetitive operation is done through a loop control instructions There are three methods by way of … Read more
The conditional operators ? and : are sometimes called ternary operators since they take three arguments. In fact, they form a kind of foreshortened if-then-else. Their general form is expression 1 ? expression 2 : expression 3 What this expression says is: “if expression 1 is true (that is, if its value is non-zero), then … Read more
C allows usage of three logical operators, namely, &&, || and !. These are to be read as ‘AND’ ‘OR’ and ‘NOT’ respectively Consider the following example The marks obtained by a student in 5 different subjects are input through the keyboard. The student gets a division as per the following rules Percentage above or … Read more
The if statement by itself will execute a single statement, or a group of statements, when the expression following if evaluates to true. It does nothing when the expression evaluates to false. Can we execute one group of statements if the expression evaluates to true and another group of statements if the expression evaluates to … Read more
Like most languages, C uses the keyword if to implement the decision control instruction. The general form of if statement looks like this: if ( this condition is true )execute this statement ; The keyword if tells the compiler that what follows is a decision control instruction. The condition following the keyword if is always … Read more
Control Instructions enable us to specify the order in which the various instructions in a program are to be executed by the computer. In other words the control instructions determine the ‘flow of control’ in a program. There are four types of control instructions in C. They are: Sequence Control Instruction Selection or Decision Control … Read more