Go: package main

import (
	"fmt"
	"strconv"
)

func main() {
	for _, leftValue := range MultiplicationTableNum(9) {
		for _, rightValue := range MultiplicationTableNum(9) {
			strLeftVal, strRightVal, strMulti := strconv.Itoa(leftValue), strconv.Itoa(rightValue), strconv.Itoa(Multiplication(leftValue, rightValue))
			fmt.Println(strLeftVal + "x" + strRightVal + "=" + strMulti)
		}
	}
}

func MultiplicationTableNum(num int) []int {
	multiNum := []int{}
	for i := 1; i <= num; i++ {
		multiNum = append(multiNum, i)
	}
	return multiNum
}

func Multiplication(x, y int) int {
	return x * y
}

C++: #include<iostream>

//関数の宣言
void Mul();

int main()
{
	Mul();

	return 0;

}

//関数の定義
void Mul(){
	for (int i = 1; i <= 9; i++){
		for (int j = 1; j <= 9; j++){
			std::cout << i << 'x' << j << '=' << i*j << '\n';
		}
	}
}

C++: #include <bits/stdc++.h>
using namespace std;

int main(void) {
	int i, j;
	for (i = 1; i <= 9; i++) {
		for (j = 1; j <= 9; j++) {
			cout << i << "x" << j << "=" << i * j << endl;
		}
	}
}

C++: #include <bits/stdc++.h>
using  namespace std;
#define ll    long long int
#define pai     pair<int,int>
#define vi      vector<int>
#define vd      vector<double>
#define mpi     map<int,int>
#define mps     map<string,int>
#define sti     stack<int>
#define stc     stack<char>
#define sei     set<int>
#define ses     set<string>
#define multii  multiset<int>

 int main()
{
  /*#ifndef ONLINE_JUDGE
  freopen("tin.txt","r",stdin);
  freopen("tout.txt","w",stdout);
  #endif*/
  ll t;
  for(int i=1;i<=9;i++){
    for(int j=1;j<=9;j++){
      cout<<i<<"x"<<j<<"="<<i*j<<endl;
    }
  }

}

C++: #include <iostream>
using namespace std;

int main(void) {
    for(int r = 1; r <= 9; r++) {
        for(int c = 1; c <= 9; c++) {
            cout << r << "×" << c << "=" << r * c << endl;
        }
    }
    
    return(0);
}

C++: #include<iostream>
#include<cstdio>
using namespace std;

int main(){
	for(int i=1;i<10;i++)
		for(int j=1;j<10;j++)
			printf("%dx%d=%d\n",i,j,i*j);
	
	return 0;
}

C++: #include<stdio.h>

int main()
{
	int i,j;
	for(i=1;i<=9;i++)
	{
		for(j=1;j<=9;j++)
		{
			printf("%dx%d=%d\n",i,j,i*j);
		}
	}
	return 0;
}

C++: #include<iostream>
int main(){
for(int i=1;i<=9;i++){
for(int j=1;i<=9;j++){
std::cout<<i<<"x"<<j<<"="<<i*j<<std::endl;
}
}
return 0;
}

C++: #include<iostream>
#include<algorithm>
using namespace std;
int main(){
	int t=68000;
	for(int i=t;i;i--){
		for(int j=max(i,9);j;j--){
			if(i<10&&j<10)cout<<10-i<<"x"<<10-j<<"="<<(10-i)*(10-j)<<endl;
		}
	}
	return 0;
}

C++: #include<stdio.h>
main(){int i=8;while(i++<89)printf("%dx%d=%d\n",i/9,i%9+1,i/9*(i%9+1));}

C++: #include <iostream>
#include <cstdio>
 
using namespace std;
 
int main()
{
  for(int i=1;i<=9;i++){
    for(int j=1;j<=9;j++){
      printf("%dx%d=%d\n",i,j,i*j);
    }
  }
  return 0;
}

C++: #include <iostream>
using namespace std;

int main(){
  for (int i=1;i<10;i++)
    for (int j=1;j<10;j++)
      cout << i << "x" << j << "="<<i*j << endl;
}

C++: #include<iostream>
using namespace std;

int main(){
	for(int i = 0; i < 9; ++i) {
		for(int j = 0; j < 9; ++j) {
			cout << i+1 << "x" << j+1 << "=" << (i+1)*(j+1) << endl;
		}
	}
    return 0;
}

C++: #include<iostream>
using namespace std;

int main(){
	for (int i = 1; i <= 9; i++){
		for (int j = 1; j <= 9; j++){
			cout << i << "x" << j << "=" << i*j << endl;
		}
	}
    return 0;
}

C++: #include<iostream>
using namespace std;

int main(void){

  int i,j;
  for(i=1; i<10; i++){
    for(j=1; j<10; j++){
      cout << i << "??" << j << "=" << i*j << endl;
    }
  }
  
  return 0;

}

C++: #include<stdio.h>

int main(){
int i,j;
for(i=1;i<=9;i++)
for(j=1;j<=9;j++)
printf("%d×%d=%d\n",i,j,i*j);
    return 0;
}

C++: #include <stdio.h>

int main(void)
{
for (int i = 1; i <= 9; i++){
for (int j = 1; j <= 9; j++){
printf("%d x %d = %d\n", i, j, i * j);
}
}

return (0);
}

C++: #define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main() {
	int i, j;

	for (i = 1;i < 10;i++) {
		for (j = 1;j < 10;j++) {
			printf("%dx%d=%d\n", i, j, i*j);
		}
	}
	return 0;
}

C++: #include<stdio.h>
using namespace std ;

int main(){
    for(int i=1;i<=9;i++){
        for(int j=1;j<=9;j++){
            printf("%dx%d=%d\n",i,j,i*j) ;
        }
    }
}

C++: #include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <vector>
#include <string>
#include <queue>
#include <algorithm>
#include <math.h>
#include <utility>
#include <set>
#include <map>
#define INF 100000
using namespace std;

int main(){
    for (int i=1; i<10; i++) {
        for (int j=1; j<10; j++) {
            cout << i <<'x' << j<<'='<<i*j<<endl;
        }
    }
}

C++: #include <iostream>
#include <cmath>
#include <string>
#include <vector>
#include <map>
#include <set>
#include <list>
#include <deque>
#include <algorithm>
#include <iomanip>
#include <functional>

#define REP(i, n) for(int i = 0;i < (n); i++)
#define REP2(i, x, n) for(int i = (x); i < (n); i++)
#define REPR(i, n) for(int i = (n); i >= 0; i--)

#define ALL(a) (a).begin(),(a).end()
#define SORT(c) sort((c).begin(),(c).end())
#define DESCSORT(c) sort(c.begin(), c.end(), greater<int>())

#define LL long long int
#define LD long double

#define PI 3.14159265358979

using namespace std;

//================================================
int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	
	REP2(i, 1, 10) {
		REP2(j, 1, 10) {
			cout << i << "x" << j << "=" << i * j <<"\n";
		}
	}

	return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;
#define FOR(i, s, n) for(int i = s; i < (int)n; i++)
#define per(i, n) for(int i = n; i >= 0; i--)
#define ROF(i, s, n) for(int i = s; i >= (int)n; i--)
#define FORIT(i, A) for (auto i : A)
#define PRINT(x) cout << (x) << "\n"
#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define MP make_pair
#define EACH(i, n) for (__typeof((n).begin()) i = (n).begin(); i != (n).end(); ++i)
#define SZ(a) int((a).size())
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())
#define CLR(a) memset((a), 0 ,sizeof(a))
#define NCLR(a) memset((a), -1 ,sizeof(a))
#define dump(x) cout << #x << " = " << (x) << "\n";
#define debug(x) cout << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << "\n";
#define sq(n) (n) * (n)
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;
typedef vector<LL> VLL;
typedef vector<VLL> VVLL;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef priority_queue<int> maxpq;
typedef priority_queue< int, vector<int>, greater<int> > minpq;
typedef complex<double> P;
static const double EPS = 1e-10;
static const double PI = acos( -1.0 );
static const int mod = 1000000007;
static const int INF = 1 << 29;
static const LL LL_INF = 1152921504606846976;
static const int dx[] = { -1, 0, 1, 0, 1, -1, 1, -1 };
static const int dy[] = { 0, -1, 0, 1, 1, 1, -1, -1 };


int main() {
#ifdef _DEBUG
	printf( "debug\n" );
#endif
	for ( int i = 1; i < 10; i++ ) {
		for ( int j = 1; j < 10; j++ ) {
			printf( "%dx%d=%d\n", i, j, i * j );
		}
	}
	return 0;
}