C if-else Statement :

if-else :

if-else statement is used to execute a statement block or a single statement depending on the value of a condition.

Example 1 :

  1. /* Description: program to find biggest of two numbers */
  3. #include<stdio.h>
  4. #include<conio.h>
  5. main()
  6. {
  7. int a,b,big;
  8. //clrscr();
  9. printf("\n Enter two numbers:\n");
  10. scanf("%d %d",&a,&b);
  11. big=a;
  12. if(b>big)
  13. big=b;
  14. printf("\n Biggest number is %d",big);
  15. getch();
  16. }

Note : clrscr() It is predefined function in "conio.h" (console input output header file), by using this function we can clear the data from consol(Monitor), Here we skip this function( just remove // to you can use this function ).
getch() is a way to get a user inputted character (getch() andgetchar() are used to read a character from screen). It can be used to hold program execution.

Output 1 :

c language - program to find biggest of two numbers

Example 2 :

  1. /* Description: simple if-else example */
  3. #include<stdio.h>
  4. main()
  5. {
  6. int a;
  7. printf("\n Enter only number 1\n");
  8. scanf("%d",&a);
  9. if(a==1)
  10. {
  11. printf("You enter right number.");
  12. }
  13. else
  14. {
  15. printf("You press wrong number.");
  16. }
  17. getch();
  18. }

Output 2 :

c language - simple if-else example

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