DECISION MAKING.pptx
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This document discusses control statements and decision making in C programming. It describes the different types of conditional statements like if, if-else, if-else-ladder statements. It also covers loops like while, for, do-while loops and their syntax. Finally, it discusses single line and multi-line comments in C with examples.
DECISION MAKING.pptx
- 2. Decision making structures require that the programmer specifies one or more conditions to be evaluated or tested by the program, along with a statement or statements to be executed if the condition is determined to be true, and optionally, other statements to be executed if the condition is determined to be false.
- 3. There are the following variants of if statement in C language. If statement If-else statement If else-if ladder Nested if
- 4. IF STATEMENT The if statement is used to check some given condition and perform some operations depending upon the correctness of that condition. It is mostly used in the scenario where we need to perform the different operations for the different conditions. The syntax if(expression){ //code to be executed }
- 5. FLOW DIAGRAM
- 7. IF-ELSE STATEMENT The if-else statement is used to perform two operations for a single condition. The if-else statement is an extension to the if statement using which, we can perform two different operations, i.e., one is for the correctness of that condition, and the other is for the incorrectness of the condition.
- 8. The syntax of the if-else statement is given below. if(expression){ //code to be executed if condition is true }else{ //code to be executed if condition is false }
- 10. IF ELSE-IF LADDER STATEMENT The if-else-if ladder statement is an extension to the if-else statement. It is used in the scenario where there are multiple cases to be performed for different conditions. In if-else-if ladder statement, if a condition is true then the statements defined in the if block will be executed, otherwise if some other condition is true then the statements defined in the else-if block will be executed, at the last if none of the condition is true then the statements defined in the else block will be executed.
- 13. SWITCH STATEMENT The switch statement in C is an alternate to if-else-if ladder statement which allows us to execute multiple operations for the different possibles values of a single variable called switch variable. Here, We can define various statements in the multiple cases for the different values of a single variable.
- 16. C LOOPS The looping can be defined as repeating the same process multiple times until a specific condition satisfies. Types of C Loops There are three types of loops in C language that is given below: do while while for
- 17. WHILE LOOP IN C A while loop in C programming repeatedly executes a target statement as long as a given condition is true. Syntax The syntax of a while loop in C programming language is while(condition) { statement(s); }
- 19. FOR LOOP IN C A for loop is a repetition control structure that allows you to efficiently write a loop that needs to execute a specific number of times. Syntax The syntax of a for loop in C programming language is for ( init; condition; increment ) { statement(s); }
- 21. DO...WHILE LOOP IN C Unlike for and while loops, which test the loop condition at the top of the loop, the do...while loop in C programming checks its condition at the bottom of the loop. A do...while loop is similar to a while loop, except the fact that it is guaranteed to execute at least one time.
- 22. The syntax of a do...while loop in C programming language is do { statement(s); } while( condition ); Notice that the conditional expression appears at the end of the loop, so the statement(s) in the loop executes once before the condition is tested.
- 24. C COMMENTS Comments can be used to explain code, and to make it more readable. It can also be used to prevent execution when testing alternative code. Comments can be singled-lined or multi-lined.
- 25. SINGLE-LINE COMMENTS Single-line comments start with two forward slashes (//). Any text between // and the end of the line is ignored by the compiler (will not be executed). This example uses a single-line comment before a line of code: Example // This is a comment printf("Hello World!");
- 26. C MULTI-LINE COMMENTS Multi-line comments start with /* and ends with */. Any text between /* and */ will be ignored by the compiler: Example /* The code below will print the words Hello World! to the screen, and it is amazing */ printf("Hello World!");