If not true, execute this instruction. c is set equal to a, because the condition a < b was true. if statement is used for branching when a single condition is to be checked. If the Boolean expression evaluates to false, then the first set of code after the end of the 'if' statement (after the closing curly brace) will be executed. The condition is evaluated first before executing any statement inside the body of If. C programming conditional operator is also known as a ternary operator. Just a simple printf() statement, printing "Num3 is max." If the condition is true, the statements inside if statement are executed, otherwise they are skipped. Conditional operator and an if..else statement. If the value is true, then statement-false is discarded (if present), otherwise, statement-true is … If the Boolean expression evaluates to true, then the block of code inside the 'if' statement will be executed. if statement is a conditional statement which is used to make decision. The above two ‘if’ statements behave the same in C-like languages. So lets take a look at an example: In the example above the user can input a number. function2() won't even be called unless the result of function1() is greater than zero. Syntax of else..if statement: An if can have zero or one else's and it must come after any else if's. An if statement can be followed by an optional else if...else statement, which is very useful to test various conditions using single if...else if statement. The syntax of the if statement in C programming is: if (test expression) { // statements to be executed if the test expression is true } How if statement works? Now take a look at the “if statement”: if the number stored in the variable A is equal to ten, then “is equal” is printed on the screen. The if statement allows you to control if a program enters a section of code or not based on whether a given condition is true or false. There are following types of conditional statements in C. If statement; If-Else statement; Nested If-else statement The && operator is a short-circuiting operator. Remember that the arguments value_if_true and value_if_false must be of the same type, and they must be simple expressions rather than full statements. C – else..if statement. The if statement can be used to test conditions so that we can alter the flow of a program. An if statement identifies which statement to run based on the value of a Boolean expression. Expression2 : Expression3 The statement that begins with if constexpr is known as the constexpr if statement. In a constexpr if statement, the value of condition must be a contextually converted constant expression of type bool. In computer programming, we use the if statement to run a block code only when a certain condition is met. Syntax of else..if statement: Before moving to next tutorial, must try some exercises based on if...else statement. The syntax of an 'if' statement in C programming language is −. In C programming language, any non zero value is considered as true and zero or null is considered false. C++ Tutorials C++11 Tutorials C++ Programs. Conditional operator is closely related with if..else statement. An if statement consists of a Boolean expression followed by one or more statements. Simple, isn’t it. || Called Logical OR Operator. One of the important functions of the if statement is that it allows the program to select an action based upon the user's input. C programming language assumes any non-zero and non-null values as true and if it is either zero or null, then it is assumed as false value. The else..if statement is useful when you need to check multiple conditions within the program, nesting of if-else blocks can be avoided using else..if statement. The if statement allows you to control if a program enters a section of code or not based on whether a given condition is true or false. The syntax for if statement is as follows: The condition evaluates to either true or false. When the above code is compiled and executed, it produces the following result −. The following C program generate a random number using rand() function of . C If statement allows the compiler to test the condition first, and then, depending upon the result, it will execute the statements. The number is stored in the variable mynumber. In C programming, the decision-making process is used to specify certain orders in which statements … Decision Making in C Programming. The ability to control the flow of your program, letting it make decisions on what code to execute, is valuable to the programmer. For example, assigning grades (A, B, C) based on marks obtained by a student. 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