C Programming: Control Statements in C Pgm
- 1. Control Statements in C Prof. Navya Francis Asst. Professor Kristu Jayanti College
- 2. • The control statements in programming languages decide the direction of the flow of program execution. • They are also known as decision control structures. Introduction
- 3. Need of Conditional Statements In everyday situations, we often find ourselves making decisions that influence our subsequent actions. Likewise, within the domain of programming, there are scenarios that necessitate decision- making, with the subsequent course of action dictated by these choices, shaping the execution of the succeeding code block.
- 4. Types of Conditional Statements in C/C++ oif Statement oif-else Statement oNested if Statement oif-else-if Ladder oswitch Statement oConditional Operator oJump Statements: o break o continue o goto o return
- 5. If Statement • The "if" statement in C serves as a decision-making construct, allowing the execution of a code block contingent on the evaluated expression's value. This fundamental concept in C programming enables the incorporation of conditional code within our program.
- 6. Syntax: if(condition) { // Statements to execute if condition is true } Flowchart
- 7. Example 1: C Program to check whether the number is even or odd. # include ,stdio.h> void main { int n = 10; if(n%2==0) { printf(“%d is Even number”,n); } } Output 10 is Even number
- 8. if else statement • The if-else statement is employed when there is a need to execute certain code if a condition is true and an alternative code if the condition is false. • Following an if statement, an optional else statement can be included, activating when the boolean expression evaluates to false.
- 9. Syntax: if(condition) { /* statement(s) will execute if the boolean expression is true */ } else { /* statement(s) will execute if the boolean expression is false */ } Flowchart:
- 10. Nested if statement A nested if statement is an if statement placed inside another if statement. Nested if statements are often used when you must test a combination of conditions before deciding on the proper action. ie.)You can use one if or else if statement inside another if or else if statement(s).
- 11. Syntax: if ( test condition 1) { //If the test condition 1 is TRUE then these it will check for test condition 2 if ( test condition 2) { //If the test condition 2 is TRUE then these statements will be executed Test condition 2 True statements; } else { //If the test condition 2 is FALSE then these statements will be executed Test condition 2 False statements; } else { //If the test condition 1 is FALSE then these statements will be executed Test condition 1 False statements; }
- 12. else if ladder/if else ladder else if ladder/if else ladder if-else ladder is an extension of if…else statement. By using one if-else construct, it is possible to choose between two choices. There may be a situation wherein it is required to select one among more than two choices. This can be accomplished by another if-else in the else part of the construct. This type of if construct is called as else if ladder statement.
- 13. Syntax: if(condition 1) statement 1; else if(condition 2) statement 2; " " " else if(condition n) statement n; else default statement;
- 14. Thank You