Small to Capital letter in C

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#include <stdio.h> int main(){ char name[]={'h', 'u', 'm','a', 'u','n'}; int i, lenth; printf("%s\n", name); lenth=6; for (i=0;i<6; i++){ if (name[i]>=97 && name[i<=122]){ name[i]='A'+name[i]-'a'; } } printf("%s",name); return(0); }