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  1. #include<stdio.h>
  2.  
  3. int main(){
  4.  
  5.     char ch;
  6.  
  7.     printf("Enter your letter that you need to convert into upper case: ");
  8.     scanf("%c",&ch);
  9.  
  10.  
  11.     if(ch>=97 && ch<=122) // if(ch>='a' && ch<='z')
  12.     {
  13.         ch = ch - 32;
  14.         printf("%c",ch);
  15.     }
  16.  
  17.  
  18.  
  19.  
  20.  
  21. return 0;
  22. }
Success #stdin #stdout 0.01s 5304KB
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Standard input is empty
stdout
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Enter your letter that you need to convert into upper case:
https://ideone.com/EjCwN6
language:
C (gcc 8.3)
created:
2 hours ago
visibility:
public

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