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Conditional statement c++
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- 4. INTRODUCTION Conditional statement are usedto execute a set of statements on some conditions. It provide a unit of block in which we can either one statement or more than one statements.
- 5. IF THE GIVEN CONDITIONIS TRUE THAN THE SET OF STATEMENT ARE EXECUTED OTHERWISE BODY IS SKIPPED….
- 8. IF CONDITION IT ISCONDITIONAL STATEMENT, WHICH IS USED TO EXECUTE A SET OF STATEMENT ON SOME CONDITIONS. THE CONDITION MUST BE OF “BOOLEAN” TYPE
- 9. AN EXPRESSION, WHICH RETURNSONLY TWO VALUE EITHER TRUE OR FALSE, IS KNOWN AS BOOLEAN TYPE EXPRESSION.
- 10. SYNTAX: THE SYNTAX OFIF STATEMENT IS AS FOLLOWS: IF(CONDITION) STATEMENT; THE ABOVE SYNTAX IS USED FOR SINGLE STATEMENT. A SET OF STATEMENT CAN ALSO BE MADE CONDITIONAL.
- 11. IN THIS CASE,THESE STATEMENT ARE WRITTEN IN CURLY BRACES. THE SET OF STATEMENTS IS ALSO CALLED COMPOUND STATEMENT. THE SYNTAX FOR COMPOUND STATEMENTS IN IF STATEMENT IS AS FOLLOWS: IF(CONDITION) { STATEMENT 1;
- 12. STATEMENT 2; STATEMENT 3; STATEMENT4; . . . STATEMENT N; }
- 14. EXAMPLE: WRITE A PROGRAMTHAT INPUTS TWO NUMBERS AND FINDS WHETHER BOTH ARE EQUAL. #INCLUDE <IOSTREAM.H> #INCLUDE <CONIO.H> VOID MAIN()
- 15. CLRSCR(); INT A,B; COUT<<’’ENTER ANUMBER:’’; CIN>>A; COUT<<’’ENTER A NUMBER:’’; CIN>>B;
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- 17. OUTPUT: ENTER A NUMBER:15 ENTER A NUMBER: 15 BOTH NUMBERS ARE EQUAL
- 18. IF-ELSE CONDITION IT ISKNOWN AS DOUBLE BLOCKED CONDITIONAL STATEMENT. IT MEANS, IT HAS TRUE PARTS AS WELL AS FALSE PART.
- 19. IF THE GIVENCONDITION IS TRUE THEN THE TRUE PART IS EXECUTED OTHERWISE FALSE PART IS EXECUTED.
- 20. SYNTAX: IF(CONDITION) STATEMENT; ELSE STATEMENT; TWO OR MORESTATEMENTS ARE WRITTEN IN CURLY BRACKETS{}.THE SYNTAX FOR COMPOUND STATEMENTS IN STATEMENT IS AS FOLLOWS:
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- 24. EXAMPLE: WRITE A PROGRAMTHAT INPUTS A NUMBER AND FINDS WHETHER IT IS EVEN OR ODD USING IF-ELSE STRUCTURE. #INCLUDE<IOSTREAM.H> #INCLUDE <CONIO.H> VOID MAIN() { CLRSCR();
- 25. INT N; COUT<<’’ENTER ANUMBER:’’; CIN>>N; IF(N%2==0) COUT<<N<<’’IS EVEN.’’; else COUT<<N<<’’IS ODD.’’; GETCH(); }
- 26. OUTPUT: ENTER A NUMBER:10 10 IS EVEN.
- 27. SWITCH STATEMENT THE SWITCH STATEMENTIS ANOTHER CONDITIONAL STRUCTURE. IT IS A GOOD ALTERNATIVE OF NESTED IF- ELSE.
- 28. IT CAN BEUSED EASILY WHEN THERE ARE MANY CHOICES AVAILABLE AND ONLY ONE SHOULD BE EXECUTED.
- 29. SYNTAX: SWITCH(EXPRESSION) { (INTEGER OR CHARACTER CONSTANT) CASECONSTANT 1: STATEMENT(S); BREAK; CASE CONSTANT 2:
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- 32. WRITE A PROGRAMTHAT INPUTS NUMBER OF WEEK’S DAY AND DISPLAY THE NAME OF THE DAY. #INCLUDE<IOSTREAM.H> #INCLUDE<CONIO.H> VOID MAIN()
- 33. { CLRSCR (); INT N; COUT<< “ENTER A NUMBER OF A WEEKDAY.”; CIN>>N; SWITCH (N) { CASE 1: COUT << “FRIDAY”; BREAK;
- 34. CASE 1: COUT <<“FRIDAY”; BREAK; CASE 2: COUT << “SATURDAY”; BREAK; CASE 3: COUT << “SUNDAY”; BREAK;
- 35. CASE 4: COUT<< “MONDAY”; BREAK; CASE5: COUT<< “TUESDAY”; BREAK; CASE 6: COUT<<“WEDNESDAY”; BREAK;
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- 37. GOTO STATEMENT THE GOTOSTATEMENT IS USED TO MOVE THE CONTROL DIRECTLY TO A PARTICULAR LOCATION OF THE PROGRAM BY USING LABEL. A LABEL IS A NAME GIVEN TO A PARTICULAR LINE OF THE PROGRAM.
- 38. A LABEL ISCREATED WITH A VALID IDENTIFIER FOLLOWED BY A COLON (:) SYNTAX: GOTO LABEL; THE “LABEL” INDICATES THE LABEL TO WHICH THE CONTROL IS TRANSFERRED.
- 40. EXAMPLE: WRITE A PROGRAMTHAT DISPLAYS “C++” FIVE TIMES USING GOTO STATEMENT. #INCLUDE<IOSTREAM.H> #INCLUDE<CONIO.H> VOID MAIN() { CLRSCR();
- 41. INT N=1; LOOP: COUT<<N<<“C++”<<ENDL; N++; IF(N<=5) GOTOLOOP; COUT<<“END OF PROGRAM”; GETCH(); }