If statements in C
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This document describes four branching structures used in decision making statements in programming: 1. If - Used to check a single condition and execute code if true. 2. If-else - Used to check a condition and execute one block of code if true and another if false. 3. Else-if ladder - Used to test multiple conditions in sequence, executing code for the first satisfied condition before exiting. 4. Nested if-else - Writing if statements inside other if statements to test complex nested conditions.
If statements in C
- 1. Branching Structure If If else Else if ladder Nested if else
- 2. Four decision making statement if if-else else if ladder nested if else
- 3. If statement It is generally used when we want to check a single condition. Syntax: if (condition) { Statement ; } START if (condition) Statement END False True
- 4. If else statement If the given condition is true, then the “if” block of code will be executed, otherwise “else” block of code will be executed. Syntax: if (condition 1) { Statement 1; } else { Statement 2; } START If (condition) Statement 1 True False Statement 2 END
- 7. Else-if ladder statement • The “else if” ladder is used to test set of conditions in a sequence. It is also considered as multi-way decision making statement. • Number of conditions are given in a sequence with subsequent statements. If any of the given condition is satisfied then the related statements are executed and the control exits from the else if ladder. That means further conditions are not going to checked. • If the condition does not satisfy then the compiler goes to next condition to check the condition.
- 8. Else-if ladder statement Syntax: if (condition 1) { Statement 1; } else if ( condition 2) { Statement 2; } - - - - - - - - - - else if (condition n) { Statement n; } else { Statement m; }
- 9. Else-if ladder statement START If (condition1 ) If (condition n) If (condition2 ) False Statement 1 True END True Statement 2 False True Statement n False Default Statement
- 11. Nested if-else statement • Writing if statement inside another is known as nested if. • While writing number of conditions, we may need to nest if statement inside another if statement.
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