18)Write a C program to convert a given string into uppercase & vice versa
#include<stdio.h>
#include<string.h>
intmain()
{
charstr[20];
inti;
printf("Enter String : ");
scanf("%s",str);
printf("----------------------------------\n");
/* To print string in lowercase*/
for(i=0;i<=strlen(str);i++)
{
if(str[i]>=65&&str[i]<=90)
str[i]=str[i]+32;
}
printf("String in Lowercase: %s",str);
/* To print string in upperCase*/
for(i=0;i<=strlen(str);i++)
{
if(str[i]>=97&&str[i]<=122)
str[i]=str[i]-32;
}
printf("\n\nString in Uppercase: %s",str);
return 0;
}
Output:
/
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